Armmor

You’re a turret with one big problem: your bullets are made of you. Blast through 20 waves of pesky drones by turning your own Armor into Ammo. Tear yourself apart; Just try not to leave yourself defenseless in the process!

Enemies can drop chunks of Armor that are automatically picked up at the end of each round, to a maximum of 10 Armor. There is no capacity on ammo, though, so eat up that armor before it goes to waste! 

I intended to make this for TriJam 328 - "Consume Your Health for Power" and I got carried away and ended up working on it for far more than 3 hours.