As a ghost, you can slingshot yourself around angry birds style with the mouse. As a zombie, wasd to move and click to shoot.
This is more like a weird sort of tech demo prototype, the kind of thing I could put on a resume to say "I made this in 48 hours and it works and functions almost correctly" more than a real game. If anyone wants to take this further, I will not stop you (but it would be nice to know about it so I can see where you take it). If you want the project files, shoot me a message pretty much anywhere with this username (reddit is good, twitter maybe, here or Ludum Dare, an email, whatever).
Oh yeah also I believe it crashes after the last level. That just means you finished!
Interesting idea, I liked having the two kind of gameplay, too bad it's not going farther.
I know there's not much content or polish, but I think a small system to explain the rule of each room would have helped a lot instead of just plain text. Something like a zombie counter on the door.
It's really weird having an arbitrary rule for each puzzle. I mean, it's not that bad but that a small thing that would have made the game more interesting I think :)
Yosi Level 16
It took a bit of time for me to get used to the controls and mechanics, but after I understood it I had fun playing the game! Unfortunately, the game crashed on one of the levels so I think I didn't get to play through the entire game. EDIT: I think it was that level.