diff --git a/game/src/chunk/chunkman.c b/game/src/chunk/chunkman.c
index f6a8885..85d97b4 100644
--- a/game/src/chunk/chunkman.c
+++ b/game/src/chunk/chunkman.c
@@ -206,7 +206,7 @@ chunkman_render (vec3 position, vec4 planes[6])
 		    }
 	      
 		  program_set_vec3_ind (RESPRG ("chunk"), "chunk_position", x * CHUNK_DIM, 0.0, z * CHUNK_DIM);
-		  ChunkMesh_render (mesh);
+		  ChunkMesh_render (mesh, flags_get ("wireframe_enabled"));
 		  n_frame_chunks++;
 		}
 	    }
diff --git a/game/src/chunk/chunkmesh.c b/game/src/chunk/chunkmesh.c
index c642dec..8e75005 100644
--- a/game/src/chunk/chunkmesh.c
+++ b/game/src/chunk/chunkmesh.c
@@ -101,7 +101,7 @@ ChunkMesh_bind (ChunkMesh *mesh)
 }
 
 void
-ChunkMesh_render (ChunkMesh *mesh)
+ChunkMesh_render (ChunkMesh *mesh, bool wireframe)
 {
   glBindBuffer (GL_ARRAY_BUFFER, mesh->pbo);
   glEnableVertexAttribArray (0);
@@ -110,13 +110,6 @@ ChunkMesh_render (ChunkMesh *mesh)
   glBindBuffer (GL_ARRAY_BUFFER, mesh->mbo);
   glEnableVertexAttribArray (1);
   glVertexAttribPointer (1, 4, GL_FLOAT, GL_FALSE, sizeof (float) * 4, 0);
-  
-  if (flags_get ("wireframe_enabled"))
-    {
-      glDrawElements (GL_LINES, CHUNK_SIZE * 6, GL_UNSIGNED_INT, 0);
-    }
-  else
-    {
-      glDrawElements (GL_TRIANGLES, CHUNK_SIZE * 6, GL_UNSIGNED_INT, 0);
-    }
+
+  glDrawElements (wireframe ? GL_LINES : GL_TRIANGLES, CHUNK_SIZE * 6, GL_UNSIGNED_INT, 0);
 }
diff --git a/game/src/chunk/chunkmesh.h b/game/src/chunk/chunkmesh.h
index 0772f88..3e5e4a7 100644
--- a/game/src/chunk/chunkmesh.h
+++ b/game/src/chunk/chunkmesh.h
@@ -3,7 +3,6 @@
 #include <SDL3/SDL_opengles2.h>
 #include <cglm/cglm.h>
 
-#include "../flags.h"
 #include "chunk.h"
 
 #define TERRAIN_TEXTURES 5
@@ -21,4 +20,4 @@ typedef struct ChunkMesh
 
 ChunkMesh *ChunkMesh_build (Chunk *chunk, Chunk *nr, Chunk *nd, Chunk *nc);
 void ChunkMesh_bind (ChunkMesh *mesh);
-void ChunkMesh_render (ChunkMesh *mesh);
+void ChunkMesh_render (ChunkMesh *mesh, bool wireframe);
diff --git a/game/src/entity/entman.c b/game/src/entity/entman.c
index 0c8955c..a4874bd 100644
--- a/game/src/entity/entman.c
+++ b/game/src/entity/entman.c
@@ -174,7 +174,7 @@ entman_render_entity (Entity *entity, void *userdata)
 
   if (entity->program != last_program)
     {
-      program_use (entity->program);
+      last_program = program_use (entity->program);
     }
 
   program_set_mat4 (entity->program, "model", model);
@@ -183,19 +183,16 @@ entman_render_entity (Entity *entity, void *userdata)
   if (entity->texture != last_texture)
     {
       glActiveTexture (GL_TEXTURE0);
-      glBindTexture (GL_TEXTURE_2D, entity->texture);
+      last_texture = texture_use (entity->texture);
     }
 
   if (entity->mesh_type != last_type)
     {
       SimpleMesh_bind (&to_render);
+      last_type = entity->mesh_type;
     }
-  
-  last_program = entity->program;
-  last_type = entity->mesh_type;
-  last_texture = entity->texture;
-  SimpleMesh_render (&to_render);
 
+  SimpleMesh_render (&to_render, flags_get ("wireframe_enabled"));
   n_frame_ents++;
 }
 
diff --git a/game/src/event/evtman.c b/game/src/event/evtman.c
index 58aaccb..825ddb3 100644
--- a/game/src/event/evtman.c
+++ b/game/src/event/evtman.c
@@ -80,16 +80,16 @@ evtman_init ()
   evtman_add_handler (1, SDL_EVENT_MOUSE_WHEEL,       evt_pred_flag, "ui_has_focus", uiman_cb_mouse_wheel,  NULL);
   evtman_add_handler (1, SDL_EVENT_TEXT_INPUT,        evt_pred_flag, "ui_has_focus", uiman_cb_text_input,   NULL);
   
-  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_W), evt_cb_flag_on,        "moving_forward");
-  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_W), evt_cb_flag_off,       "moving_forward");
-  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_S), evt_cb_flag_on,        "moving_backward");
-  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_S), evt_cb_flag_off,       "moving_backward");
-  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_A), evt_cb_flag_on,        "moving_left");
-  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_A), evt_cb_flag_off,       "moving_left");
-  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_D), evt_cb_flag_on,        "moving_right");
-  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_D), evt_cb_flag_off,       "moving_right");
-  evtman_add_handler (0, SDL_EVENT_MOUSE_MOTION,      NULL,           NULL,         evt_cb_rotate_camera,  NULL);
-  evtman_add_handler (0, SDL_EVENT_MOUSE_BUTTON_DOWN, evt_pred_mouse, KEY (3),      uiman_cb_switch_focus, NULL);
+  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_W),   evt_cb_flag_on,        "moving_forward");
+  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_W),   evt_cb_flag_off,       "moving_forward");
+  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_S),   evt_cb_flag_on,        "moving_backward");
+  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_S),   evt_cb_flag_off,       "moving_backward");
+  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_A),   evt_cb_flag_on,        "moving_left");
+  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_A),   evt_cb_flag_off,       "moving_left");
+  evtman_add_handler (0, SDL_EVENT_KEY_DOWN,          evt_pred_key,   KEY (SDLK_D),   evt_cb_flag_on,        "moving_right");
+  evtman_add_handler (0, SDL_EVENT_KEY_UP,            evt_pred_key,   KEY (SDLK_D),   evt_cb_flag_off,       "moving_right");
+  evtman_add_handler (0, SDL_EVENT_MOUSE_MOTION,      NULL,           NULL,           evt_cb_rotate_camera,  NULL);
+  evtman_add_handler (0, SDL_EVENT_KEY_DOWN, evt_pred_key,            KEY (SDLK_TAB), uiman_cb_switch_focus, NULL);
 
 #undef KEY
 }
diff --git a/game/src/gl/mesh.c b/game/src/gl/mesh.c
index 6450dfb..219ee2e 100644
--- a/game/src/gl/mesh.c
+++ b/game/src/gl/mesh.c
@@ -20,16 +20,9 @@ SimpleMesh_bind (SimpleMesh *mesh)
 }
 
 void
-SimpleMesh_render (SimpleMesh *mesh)
+SimpleMesh_render (SimpleMesh *mesh, bool wireframe)
 {
-  if (flags_get ("wireframe_enabled"))
-    {
-      glDrawElements (GL_LINES, mesh->indices_len, GL_UNSIGNED_INT, 0);
-    }
-  else
-    {
-      glDrawElements (GL_TRIANGLES, mesh->indices_len, GL_UNSIGNED_INT, 0);
-    }
+  glDrawElements (wireframe ? GL_LINES : GL_TRIANGLES, mesh->indices_len, GL_UNSIGNED_INT, 0);
 }
 
 SimpleMesh
diff --git a/game/src/gl/mesh.h b/game/src/gl/mesh.h
index ef4ceee..c52596f 100644
--- a/game/src/gl/mesh.h
+++ b/game/src/gl/mesh.h
@@ -14,7 +14,7 @@ typedef struct SimpleMesh
 } SimpleMesh;
 
 void SimpleMesh_bind (SimpleMesh *mesh);
-void SimpleMesh_render (SimpleMesh *mesh);
+void SimpleMesh_render (SimpleMesh *mesh, bool wireframe);
 
 SimpleMesh SimpleMesh_make_quad1 ();
 SimpleMesh SimpleMesh_make_quad2 ();
diff --git a/game/src/gl/program.c b/game/src/gl/program.c
index 31f45c2..a912390 100644
--- a/game/src/gl/program.c
+++ b/game/src/gl/program.c
@@ -1,6 +1,13 @@
 
 #include "program.h"
 
+unsigned int
+program_use (int program)
+{
+  glUseProgram (program);
+  return program;
+}
+
 void
 shader_fail (int shader)
 {
@@ -42,7 +49,7 @@ program_fail (int program)
     }
 }
 
-int
+unsigned int
 program_create (const char *v_src, const char *f_src)
 {
   int success = 0;
diff --git a/game/src/gl/program.h b/game/src/gl/program.h
index f05c42a..bd81e52 100644
--- a/game/src/gl/program.h
+++ b/game/src/gl/program.h
@@ -5,12 +5,10 @@
 
 #include "../util.h"
 
-/* Just for clarity sake. */
-#define program_use glUseProgram
-
+unsigned int program_use (int program);
 void shader_fail (int shader);
 void program_fail (int program);
-int program_create (const char *v_src, const char *f_src);
+unsigned int program_create (const char *v_src, const char *f_src);
 void program_set_float (int program, const char *name, float value);
 void program_set_int_array (int program, const char *name, size_t count, int *value);
 void program_set_vec3 (int program, const char *name, vec3 value);
diff --git a/game/src/gl/texture.c b/game/src/gl/texture.c
index efeedaf..c5baf45 100644
--- a/game/src/gl/texture.c
+++ b/game/src/gl/texture.c
@@ -1,5 +1,12 @@
 #include "texture.h"
 
+unsigned int
+texture_use (unsigned int texture)
+{
+  glBindTexture (GL_TEXTURE_2D, texture);
+  return texture;
+}
+
 unsigned int
 texture_create (int width, int height, unsigned char *data)
 {
diff --git a/game/src/gl/texture.h b/game/src/gl/texture.h
index 587abdd..c22f1d2 100644
--- a/game/src/gl/texture.h
+++ b/game/src/gl/texture.h
@@ -2,4 +2,5 @@
 
 #include <SDL3/SDL_opengles2.h>
 
+unsigned int texture_use (unsigned int texture);
 unsigned int texture_create (int width, int height, unsigned char *data);
diff --git a/game/src/resources.c b/game/src/resources.c
index 862f83c..daf6eb9 100644
--- a/game/src/resources.c
+++ b/game/src/resources.c
@@ -1,8 +1,5 @@
 #include "resources.h"
 
-/* TODO: Warn if program doesn't exist, make program_use and
-   texture_use return the textures/ */
-
 static GHashTable *programs;
 static GHashTable *textures;
 
@@ -79,12 +76,22 @@ resources_add_texture (char *key, unsigned int texture)
 unsigned int
 resources_get_program (char *key)
 {
+  if (!g_hash_table_contains (programs, key))
+    {
+      WARN ("Program `%s' does not exist. Careful!", key);
+    }
+  
   return GPOINTER_TO_INT (g_hash_table_lookup (programs, key));
 }
 
 unsigned int
 resources_get_texture (char *key)
 {
+  if (!g_hash_table_contains (textures, key))
+    {
+      WARN ("Texture `%s' does not exist. Careful!", key);
+    }
+  
   return GPOINTER_TO_INT (g_hash_table_lookup (textures, key));
 }
 
diff --git a/game/src/ui/uielement.c b/game/src/ui/uielement.c
index da46871..97b24b2 100644
--- a/game/src/ui/uielement.c
+++ b/game/src/ui/uielement.c
@@ -1,7 +1,8 @@
 #include "uielement.h"
 
-/* TODO: Convert to mat3's and 2D affine transformations. */
 /* TODO: Alpha blending. */
+/* TODO: Texture support in the uielement shader. */
+/* TODO: UTF-8 support */
 
 static SimpleMesh quad;
 static unsigned int last_program;
@@ -20,8 +21,6 @@ ui_el_new_internal (UIKind kind)
   UIElement *e = g_new0 (UIElement, 1);
   e->kind = kind;
   e->visible = true;
-  glm_vec4_zero (e->background_color);
-  glm_vec2_zero (e->position);
   glm_vec2_one (e->scale);
   e->children = g_array_new (false, false, sizeof (UIElement *));
   return e;
@@ -47,7 +46,7 @@ UIElement_label_new (const char *text)
 {
   UIElement *e = ui_el_new_internal (UI_KIND_LABEL);
   e->label.text = g_string_new (text);
-  glm_vec4_one (e->label.color);
+  glm_vec4_one (e->label.text_color);
   return e;  
 }
 
@@ -60,6 +59,39 @@ UIElement_set_on_tick (UIElement *element,
   element->userdata = userdata;
 }
 
+void
+UIElement_set_on_left_click (UIElement *element,
+			     void (*on_left_click) (struct UIElement *self, void *userdata),
+			     void *userdata)
+{
+  element->on_left_click = on_left_click;
+  element->userdata = userdata;
+}
+
+void
+UIElement_set_background_color (UIElement *element, float r, float g, float b, float a)
+{
+  glm_vec4_copy ((vec4) { r, g, b, a }, element->background_color);
+}
+
+void
+UIElement_set_hover_background_color (UIElement *element, float r, float g, float b, float a)
+{
+  glm_vec4_copy ((vec4) { r, g, b, a }, element->hover_background_color);
+}
+
+void
+UIElement_set_position (UIElement *element, float x, float y)
+{
+  glm_vec2_copy ((vec2) { x, y }, element->position);
+}
+
+void
+UIElement_set_scale (UIElement *element, float x, float y)
+{
+  glm_vec2_copy ((vec2) { x, y }, element->scale);
+}
+
 void
 UIElement_add_child (UIElement *parent, UIElement *child)
 {
@@ -68,7 +100,7 @@ UIElement_add_child (UIElement *parent, UIElement *child)
 }
 
 void
-UILabel_render_text (UIElement *element, mat3 parent_model)
+UIElement_label_render_text (UIElement *element, mat3 parent_model)
 {
   mat3 model;
   glm_mat3_copy (parent_model, model);
@@ -86,16 +118,15 @@ UILabel_render_text (UIElement *element, mat3 parent_model)
 
   if (last_program != RESPRG ("uitext"))
     {
-      program_use (RESPRG ("uitext"));
-      last_program = RESPRG ("uitext");
+      last_program = program_use (RESPRG ("uitext"));
     }
   
   for (guint i = 0; i < element->label.text->len; ++i)
     {
       program_set_mat3 (RESPRG ("uitext"), "model", model);
       program_set_float (RESPRG ("uitext"), "character", element->label.text->str[i]);
-      program_set_vec4 (RESPRG ("uitext"), "color", element->label.color);
-      SimpleMesh_render (&quad);
+      program_set_vec4 (RESPRG ("uitext"), "color", element->label.text_color);
+      SimpleMesh_render (&quad, false); /* UI always without wireframe. */
       glm_translate2d (model, (vec2) { 1.5f, 0.0f });
     }
 }
@@ -139,8 +170,7 @@ UIElement_render_with_model (UIElement *element, mat3 parent_model)
 
   if (last_program != RESPRG ("uielement"))
     {
-      program_use (RESPRG ("uielement"));
-      last_program = RESPRG ("uielement");
+      last_program = program_use (RESPRG ("uielement"));
     }
   
   mat3 model;
@@ -156,18 +186,20 @@ UIElement_render_with_model (UIElement *element, mat3 parent_model)
   if (element->kind != UI_KIND_ROOT)
     {
       program_set_mat3 (RESPRG ("uielement"), "model", model);
-      program_set_vec4 (RESPRG ("uielement"), "color", element->background_color);
+      program_set_vec4 (RESPRG ("uielement"), "color",
+			element->hovered ? element->hover_background_color
+			: element->background_color);
 
       glActiveTexture (GL_TEXTURE0);
-      glBindTexture (GL_TEXTURE_2D, element->image);
+      texture_use (element->texture);
       
-      SimpleMesh_render (&quad);
+      SimpleMesh_render (&quad, false);
     }
 
   if (element->kind == UI_KIND_LABEL)
     {
       /* Here, we additionally render the text. */
-      UILabel_render_text (element, model);
+      UIElement_label_render_text (element, model);
     }
 
   for (guint i = 0; i < element->children->len; ++i)
@@ -177,6 +209,45 @@ UIElement_render_with_model (UIElement *element, mat3 parent_model)
     }
 }
 
+static bool
+UIElement_hit_test (UIElement *element, mat3 parent_model, vec2 point)
+{
+  mat3 model;
+  glm_mat3_copy (parent_model, model);
+  glm_translate2d (model, element->position);
+  glm_scale2d (model, element->scale);
+
+  mat3 inv;
+  glm_mat3_inv (model, inv);
+
+  vec3 local;
+  glm_mat3_mulv (inv, (vec3) { point[0], point[1], 1.0 }, local);
+  
+  return local[0] >= -1.0f && local[0] <= 1.0f && local[1] >= -1.0f && local[1] <= 1.0f;
+}
+
+UIElement *
+UIElement_find_xy (UIElement *element, mat3 parent_model, vec2 mouse_ui_pos)
+{
+  mat3 model;
+  glm_mat3_copy (parent_model, model);
+  glm_translate2d (model, element->position);
+  glm_scale2d (model, element->scale);
+
+  for (int i = element->children->len - 1; i >= 0; --i)
+    {
+      UIElement *child = g_array_index (element->children, UIElement *, i);
+      UIElement *hit = UIElement_find_xy (child, model, mouse_ui_pos);
+      if (hit)
+	return hit;
+    }
+
+  if (element->kind != UI_KIND_ROOT && UIElement_hit_test (element, parent_model, mouse_ui_pos))
+    return element;
+  
+  return NULL;
+}
+
 void
 UIElement_tick (UIElement *element)
 {
@@ -195,12 +266,12 @@ UIElement_tick (UIElement *element)
 void
 UIElement_render (UIElement *element)
 {
+  last_program = -1;
+  
   if (element->kind == UI_KIND_ROOT && element->parent == NULL)
     {
       SimpleMesh_bind (&quad);
-      program_use (RESPRG ("uielement"));
-      last_program = RESPRG ("uielement");
-      
+
       glActiveTexture (GL_TEXTURE0);
       glBindTexture (GL_TEXTURE_2D, 0);
       
@@ -210,15 +281,46 @@ UIElement_render (UIElement *element)
 }
 
 void
-UILabel_on_tick_show_int (UIElement *element, void *userdata)
+UIElement_label_set_text (UIElement *element, const char *text)
 {
-  int *value = userdata;
-  g_string_printf (element->label.text, "%d", *value);
+  g_string_overwrite (element->label.text, 0, text);
 }
 
 void
-UILabel_on_tick_show_float (UIElement *element, void *userdata)
+UIElement_label_printf (UIElement *element, const char *format, ...)
+{
+  va_list args;
+  va_start (args, format);
+  g_string_vprintf (element->label.text, format, args);
+  va_end (args);
+}
+
+void
+uicb_label_show_int (UIElement *element, void *userdata)
+{
+  int *value = userdata;
+  UIElement_label_printf (element, "%d", *value);
+}
+
+void
+uicb_label_show_float (UIElement *element, void *userdata)
 {
   float *value = userdata;
-  g_string_printf (element->label.text, "%3.2f", *value);
+  UIElement_label_printf (element, "%3.2f", *value);
+}
+
+void
+uicb_flag_switch (UIElement *element, void *userdata)
+{
+  UNUSED (element);
+  char *flag = userdata;
+  flags_switch (flag);
+}
+
+void
+uicb_debug_print (UIElement *element, void *userdata)
+{
+  UNUSED (element);
+  char *text = userdata;
+  INFO ("%s", text);
 }
diff --git a/game/src/ui/uielement.h b/game/src/ui/uielement.h
index c9f08bf..0a3fd0d 100644
--- a/game/src/ui/uielement.h
+++ b/game/src/ui/uielement.h
@@ -7,6 +7,7 @@
 
 #include "../util.h"
 #include "../resources.h"
+#include "../flags.h"
 #include "../gl/mesh.h"
 #include "../gl/program.h"
 
@@ -14,7 +15,7 @@ typedef enum UIKind
   {
     UI_KIND_ROOT,
     UI_KIND_CONTAINER,
-    UI_KIND_LABEL,
+    UI_KIND_LABEL
   } UIKind;
 
 typedef struct UIContainer
@@ -24,7 +25,7 @@ typedef struct UIContainer
 
 typedef struct UILabel
 {
-  vec4 color;
+  vec4 text_color;
   GString *text;
 } UILabel;
 
@@ -36,11 +37,13 @@ typedef struct UIElement
 
   vec2 position;
   vec2 scale;
-  vec4 background_color;
-  unsigned int image;
+  vec4 background_color, hover_background_color;
+  unsigned int texture;
   bool visible;
+  bool hovered;
 
   void *userdata;
+  bool ignores_events;
   
   void (*on_left_click) (struct UIElement *self, void *userdata);
   void (*on_right_click) (struct UIElement *self, void *userdata);
@@ -59,9 +62,23 @@ UIElement *UIElement_container_new (bool horizontal);
 UIElement *UIElement_label_new (const char *text);
 
 void UIElement_add_child (UIElement *parent, UIElement *child);
+
+void UIElement_set_on_left_click (UIElement *element, void (*on_left_click) (struct UIElement *self, void *userdata), void *userdata);
 void UIElement_set_on_tick (UIElement *element, void (*on_tick) (struct UIElement *self, void *userdata), void *userdata);
+void UIElement_set_background_color (UIElement *element, float r, float g, float b, float a);
+void UIElement_set_hover_background_color (UIElement *element, float r, float g, float b, float a);
+void UIElement_set_position (UIElement *element, float x, float y);
+void UIElement_set_scale (UIElement *element, float x, float y);
+
+UIElement *UIElement_find_xy (UIElement *element, mat3 parent_model, vec2 mouse_ui_pos);
 void UIElement_tick (UIElement *element);
 void UIElement_render (UIElement *element);
 
-void UILabel_on_tick_show_int (UIElement *element, void *userdata);
-void UILabel_on_tick_show_float (UIElement *element, void *userdata);
+void UIElement_label_set_text (UIElement *element, const char *text);
+void UIElement_label_printf (UIElement *element, const char *format, ...);
+
+void uicb_label_show_int (UIElement *element, void *userdata);
+void uicb_label_show_float (UIElement *element, void *userdata);
+
+void uicb_flag_switch (UIElement *element, void *userdata);
+void uicb_debug_print (UIElement *element, void *userdata);
diff --git a/game/src/ui/uiman.c b/game/src/ui/uiman.c
index aa2adc6..1d86740 100644
--- a/game/src/ui/uiman.c
+++ b/game/src/ui/uiman.c
@@ -3,8 +3,10 @@
 extern SDL_Window *sdl_window;
 extern float delta_time;
 extern int n_frame_ents, n_frame_chunks;
+extern vec3 camera_position;
 
 static UIElement *ui_root;
+static UIElement *hovered_element;
 
 void
 uiman_init ()
@@ -13,26 +15,47 @@ uiman_init ()
   ui_root = UIElement_root_new ();
   
   UIElement *container = UIElement_container_new (false);
-  container->scale[0] = 0.4;
-  container->scale[1] = 0.07;
-  container->position[0] = -0.5;
-  container->position[1] = 0.83;
-  glm_vec3_copy ((vec4) { 1.0, 0.0, 0.0, 1.0 }, container->background_color);
+  UIElement_set_position (container, -0.5, 0.75);
+  UIElement_set_scale (container, 0.4, 0.15);
+  UIElement_set_background_color (container, 1.0, 0.0, 0.0, 1.0);
 
   UIElement *frame_time = UIElement_label_new ("Frame time: ");
-  UIElement *container2 = UIElement_container_new (true);
+  UIElement_set_on_tick (frame_time, uicb_label_show_float, &delta_time);
+
+  UIElement *game_name = UIElement_label_new (NULL);
+  UIElement_label_printf (game_name, "%s %s", GAME_NAME, GAME_VERSION);
+  
   UIElement *entities_rendered = UIElement_label_new ("Entities rendered: ");
   UIElement *chunks_rendered = UIElement_label_new ("Chunks rendered: ");
+  UIElement_set_on_tick (entities_rendered, uicb_label_show_int, &n_frame_ents);
+  UIElement_set_on_tick (chunks_rendered, uicb_label_show_int, &n_frame_chunks);
 
-  UIElement_set_on_tick (frame_time, UILabel_on_tick_show_float, &delta_time);
-  UIElement_set_on_tick (entities_rendered, UILabel_on_tick_show_int, &n_frame_ents);
-  UIElement_set_on_tick (chunks_rendered, UILabel_on_tick_show_int, &n_frame_chunks);
-
+  UIElement *container2 = UIElement_container_new (true);
   UIElement_add_child (container2, entities_rendered);
   UIElement_add_child (container2, chunks_rendered);
+
+  UIElement *pos_x = UIElement_label_new ("X: ");
+  UIElement *pos_y = UIElement_label_new ("Y: ");
+  UIElement *pos_z = UIElement_label_new ("Z: ");
+  UIElement_set_on_tick (pos_x, uicb_label_show_float, &camera_position[0]);
+  UIElement_set_on_tick (pos_y, uicb_label_show_float, &camera_position[1]);
+  UIElement_set_on_tick (pos_z, uicb_label_show_float, &camera_position[2]);
   
+  UIElement *container3 = UIElement_container_new (true);
+  UIElement_add_child (container3, pos_x);
+  UIElement_add_child (container3, pos_y);
+  UIElement_add_child (container3, pos_z);
+
+  UIElement *wireframe_button = UIElement_label_new ("Toggle wireframe");
+  UIElement_set_background_color (wireframe_button, 0.2, 0.2, 0.2, 1.0);
+  UIElement_set_hover_background_color (wireframe_button, 0.3, 0.3, 0.3, 1.0);
+  UIElement_set_on_left_click (wireframe_button, uicb_flag_switch, "wireframe_enabled");
+  
+  UIElement_add_child (container, game_name);
   UIElement_add_child (container, frame_time);
   UIElement_add_child (container, container2);
+  UIElement_add_child (container, container3);
+  UIElement_add_child (container, wireframe_button);
   
   UIElement_add_child (ui_root, container);
 }
@@ -49,6 +72,12 @@ uiman_render ()
   UIElement_render (ui_root);
 }
 
+static inline void
+screen_to_ui_coords (int mouse_x, int mouse_y, int screen_w, int screen_h, vec2 out_coords) {
+  out_coords[0] = (float) mouse_x / (float) screen_w * 2.0 - 1.0;
+  out_coords[1] = 1.0 - (float) mouse_y / (float) screen_h * 2.0;
+}
+
 bool
 uiman_cb_switch_focus (SDL_Event *event, void *data)
 {
@@ -75,14 +104,64 @@ uiman_cb_key_up (SDL_Event *event, void *data)
 bool
 uiman_cb_mouse_motion (SDL_Event *event, void *data)
 {
-  UNUSED (event, data);
+  /* What even is in data at this point? No fucking idea. */
+  UNUSED (data);
+  int win_w, win_h;
+  SDL_GetWindowSize (sdl_window, &win_w, &win_h);
+
+  vec2 ui_pos;
+  screen_to_ui_coords (event->motion.x, event->motion.y, win_w, win_h, ui_pos);
+
+  UIElement *element = UIElement_find_xy (ui_root, GLM_MAT3_IDENTITY, ui_pos);
+
+  if (element != hovered_element)
+    {
+      if (hovered_element)
+	{
+	  hovered_element->hovered = false;
+	}
+
+      if (element)
+	{
+	  element->hovered = true;
+	}
+
+      hovered_element = element;
+    }
+    
+  /* This callback always eats the event, because why would the game
+     need mouse motion if the UI has stolen the focus? */
   return true;
 }
 
 bool
 uiman_cb_button_down (SDL_Event *event, void *data)
 {
-  UNUSED (event, data);
+  UNUSED (data);
+
+  int win_w, win_h;
+  SDL_GetWindowSize (sdl_window, &win_w, &win_h);
+
+  vec2 ui_pos;
+  screen_to_ui_coords (event->motion.x, event->motion.y, win_w, win_h, ui_pos);
+
+  UIElement *element = UIElement_find_xy (ui_root, GLM_MAT3_IDENTITY, ui_pos);
+
+  if (element)
+    {
+      if (event->button.button == SDL_BUTTON_LEFT && element->on_left_click)
+	{
+	  element->on_left_click (element, element->userdata);
+	  return true;
+	}
+
+      if (event->button.button == SDL_BUTTON_RIGHT && element->on_right_click)
+	{
+	  element->on_right_click (element, element->userdata);
+	  return true;
+	}
+    }
+  
   return false;
 }
 
diff --git a/game/src/ui/uiman.h b/game/src/ui/uiman.h
index 0617d2d..42e4d01 100644
--- a/game/src/ui/uiman.h
+++ b/game/src/ui/uiman.h
@@ -3,6 +3,7 @@
 #include "uielement.h"
 #include "../flags.h"
 #include "../state.h"
+#include "../camera.h"
 
 void uiman_init ();
 void uiman_tick ();
diff --git a/game/src/util.h b/game/src/util.h
index 333e0f6..4d9e71c 100644
--- a/game/src/util.h
+++ b/game/src/util.h
@@ -3,8 +3,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#define GAME_NAME    "Wschód"
-#define GAME_VERSION "0.1"
+#define GAME_NAME    "Wschod"
+#define GAME_VERSION "0.2"
 
 #define COLOR_BLUE   "\x1B[34m"
 #define COLOR_RED    "\x1B[31m"