Space Bam!

Blow up the required number of enemies within a minute to progress to each new wave.

Battle unique enemies while avoiding asteroids.

Upgrade your ship until it becomes a truly mean machine.

Your front and rear shields regenerate quickly. Hull damage takes time repair though. 

Mines can be useful for setting up traps, but have a high energy cost.

Mouse and keyboard are supported, but an Xbox compatible gamepad will give the best experience.

(Sprites from: Daniel Cook)