A single tank against an alien race, how long you can you defend your planet?

      A very small game I made in a weekend, which uses the Game Boy color palette and has a resolution of 64 by 64 pixels. It is nothing great, but I would still greatly appreciate any form of feedback.

                    

Controls:

WASD to move.

Space to jump/select.

Arrow Keys to fire bullets.

Ctrl with +/- for pixel perfect scaling.

Alt to fullscreen.

//note, you can change the game volume by adjusting the bottom number in the "Settings.txt" file in the Content folder, 0 to 100.