fix(game): Исправлены начальные координаты мяча - X и Y координаты в центре

src/game.js

@@ -28,8 +28,8 @@ export class Game {
     this.status = 'in_process';
 
     this.ball = new Ball(
-      CONTAINER_WIDTH / 2 - BALL_RADIUS,
-      CONTAINER_HEIGHT / 2 - BALL_RADIUS,
+      CONTAINER_WIDTH / 2 - BALL_RADIUS / 2,
+      CONTAINER_HEIGHT / 2 - BALL_RADIUS / 2,
       BALL_RADIUS,
       BALL_SPEED * Math.cos(toRadians(BALL_INITIAL_ANGLE)),
       -1 * BALL_SPEED * Math.sin(toRadians(BALL_INITIAL_ANGLE)),