I like the concept but there were some things holding it back. There weren't any instructions on how to attack (or maybe I missed them). My guns seemed to work automatically, but none of the other weapons seemed to do anything (or maybe I just didn't know how to use them). The enemies respawning right on top of my character and killing me seemed unfair. Despite that, I did keep playing to see what sort of upgrades I could get. Just need to polish things a bit.