Zombified

This is a game for the Blackthornprod game jam. I made it in a week. Your goal as the player is to fend off waves of attacking zombies and other monsters. However, every time you shoot your limited health decreases -- it is your main resource. To get your health back, pick up the hearts and powerups falling from the night sky. Unfortunately, I was unable to complete finished the project as I ran out of time, so nothing really happens after the tenth wave...