Space Warrior

Changes I made to the game:

1. Added a screen before each level to explain that level's goal
2. Introduced a moveable asteroid element that can be pushed toward enemies to do massive damage
3. Added a boss enemy whose remaining health is displayed on the screen
4. Created a station defense mission where the player has to protect a space station from enemy attack; the station's health is displayed on the screen
5. Introduced the Station Hunter enemy which shoots at the space station  then crashes into it

Credits

Created by Dan Sibley