this game is really fun. the game has good looks and sound. the music is also good.
i like the creativity. it feels wacky, and i like it. the controls are good and simple. the rooms are a bit to small for the last waves, which spawn to much enemies for the room. talking about enemies, they are way too slow, and not really fun to fight. i'd suggest adding more types, like a fast one and a shooting one.
this would make a great mobile game.