Slime VolleyBall

We have cloned almost all of the slime volleyball game with few exceptions. We have not done the scoring system yet by showing the score on the screen and we have not cloned the eye-tracking of the slimes.
Ideas:

• Add a second ball when the game passes 15s. The second ball will drop opposite the side of the first ball. This would add difficulty to the game and also prevent rounds from being too long.
• Add a bonus point for scoring the ball in the corner.
• Add sound.

Here is the version of the game we are cloning.