Space Blaster! 2D Shooter

Defeat incoming enemy ships! 2-D shooter game in development. Proposed modifications: 1. Create more game levels for a total of 5 playable levels. The environment size will increase as you go with the player fire rate decreasing. 2. Add power ups (shield, temporary speed increase, etc). I would love to add special flying maneuvers if its not too hard. 3. Change existing enemy graphics, I want them to be ships versus aliens/creatures. And/or add stationary astroids throughout the environment. Cre...