Add particle rotation

game.js

@@ -206,7 +206,7 @@ function reveal_cell_cosmetic(cell) {
     let x = cell.offsetLeft - cell.scrollLeft;
     let y = cell.offsetTop - cell.scrollTop;
 
-    spawn_particle(x, y, (Math.random() * 2 - 1) / 16, -0.3, 0, 1, dummy_image, w, h);
+    spawn_particle(x, y, (Math.random() * 2 - 1) / 16, -0.3, 0, (Math.random() * 2 - 1) / 16, dummy_image, w, h);
 }
 
 // Shows the game won/over popup.

index.html

@@ -8,7 +8,6 @@
     <canvas id="particle-canvas"></canvas>
     <div id="main-menu">
       <span id="game-title">Gravedigger</span>
-      <span id="subtitle">a CFPI-FPSI creation</span>
       <div id="button-list">
       </div>
     </div>

particles.js

@@ -51,9 +51,9 @@ function update_particles(delta_time) {
 	particle.vel_y += 0.001 * delta_time;	
 	// Render particle.
 	particle_ctx.save();	
-	// particle_ctx.translate(-particle.width / 2, -particle.height / 2);
-	// particle_ctx.rotate(particle.rot * Math.PI / 180);
-	particle_ctx.drawImage(particle.img, particle.x, particle.y, particle.w, particle.h)
+	particle_ctx.translate(particle.x + particle.w / 2, particle.y + particle.h / 2);
+	particle_ctx.rotate(particle.rot * Math.PI / 180);
+	particle_ctx.drawImage(particle.img, -particle.w / 2, -particle.h / 2, particle.w, particle.h)
 	particle_ctx.restore();
     }
 }

style.css

@@ -68,11 +68,6 @@ body.popup-victory { #nextlevel { display: block; } }
 span#game-title {
     font-size: 3em;
     margin: 16px;
-    margin-bottom: 0;
-}
-
-span#subtitle {
-    margin: 16px;
 }
 
 #button-list {