Author's note:

I've been using gamemaker for 2 months and here is my first game I am posting. It's an arcade game were you have to shoot down ufo's with your flying tank.
The graphics aren't great but I tried my best.

The controls are WASD for movement and you aim your aimer with the mouse and left click to shoot a small fireball and right click to shoot a large one. (all this info
and more can be found in the instructions button on the main menu)

No install needed