2D Space Shooter [Modified!] - MSU

This is my modified 2D Space Shooter.

[Modifications]

- Added instructions on the instruction screen

- Composed 3 new songs (one on the Main Menu Page, one in Level 1 and Level 2, and one in Level 3)

- Added a "Challenge" Level: see how long you can last through a wave of endless aliens!

- Modified levels.

-Created a new sprite for the space ship

-Drew new backgrounds for every level