Several improvements

game.js

@@ -1,12 +1,11 @@
 class Game {
     constructor(container) {
         this.elements = {
-            highscore: container.querySelector('#highscore'),
             score: container.querySelector('#score'),
-            coinCount: container.querySelector('#coin-count'),
             pauseBtn: container.querySelector('.play-btn'),
             pauseMenu: container.querySelector('#pause-menu'),
             gameOverMenu: container.querySelector('#game-over-menu'),
+            speedUpContainer: container.querySelector('.speed-up-container'),
         };
 
         this.canvas = container.querySelector('#canvas');
@@ -61,10 +60,12 @@ class Game {
         });
 
         this.canvas.addEventListener('mouseup', (e) => {
-            this.mousePos = cbRelMousePos(e);
+            if (this.mousePos) {
-            this.shoot().then(() => {
+                this.mousePos = cbRelMousePos(e);
-                this.mousePos = null;
+                this.shoot().then(() => {
-            });
+                    this.mousePos = null;
+                });
+            }
         });
 
         this.elements.pauseBtn.addEventListener('click', () => {
@@ -246,7 +247,7 @@ class Game {
                     powerUp.remove();
                 });
             }
-        })
+        });
     }
 
     increaseRoundNumber() {
@@ -256,15 +257,14 @@ class Game {
     }
 
     increaseCoinCount() {
-        coinCount++;
+        setCoinCount(coinCount + 1);
-
-        this.elements.coinCount.innerText = coinCount;
     }
 
     update() {
-        this.balls.forEach(ball => {
+        for (let i = 0; i < this.speed; i++) {
-            ball.update(10);
+            this.balls.forEach(ball => {
-        });
+                ball.update(10);
+            });
 
             this.coinAngle += .05;
             if (this.coinAngle >= 2 * Math.PI) {
@@ -295,7 +295,7 @@ class Game {
         this.increaseRoundNumber();
         this.addNewObjects();
         this.shiftObjectsDown();
-        this.play()
+        this.play();
     }
 
     play() {