7/4/2025 - Jumping fix and Level 2

Additions and fixes:

- Fixed the jumping mechanic so now the player actually falls back to the ground even if they are pressing the left or right arrow keys and not just when they press only the space bar.

- Added a second level

Things that still need to be added/fixed:

- Enemy in level 2: There is an enemy in level 2 but it currently has no functionality

- 'Climbing' walls: The player is currently able to move up walls if they are touching a wall and press and hold the space bar. They shouldn't be able to do this and I need to fix this