Don't tell me you made the game engine and game in 3 days?
The game is pretty good, I like that you're able to come across your dead bodies and ghost walking around.
I did spawn inside a monster which looked weird. The walls being all the same makes it hard to navigate. I managed to complete the game but I know people who get lost turning around would have a lot of difficulty with the game and get frustrated with it easily.
Oh, if you could colour the ghosts depending on when they died, that'd be really cool. I had 2 ghosts in the same area at one point and couldn't tell which was which. The last level might need more monsters/things which can kill you, I was walking around for awhile not knowing whether I was close or going the wrong way.
It's a good advertisement for your game engine.