Post-Jam update

Post-jam Update

Some polishment and small fixes that we weren't able to submit during the jam due to time restrictions:

• Controls: added support for arrow keys movement.
• Gameplay: added randomness to cup spawn (position and type).
• Gameplay: added proper collisions with the bar so it is not jittery anymore.
• Bugfix: fixed some edge cases that would cause the coffee/milk spray sound to persist after a gameover.