Really cool idea. The monster scared me plenty of times. Gladly, I didn't scream - since I'm in a library, it'd be pretty embarrassing. :P
Once I found the petrol station, I couldn't do anything to go there, though. I know you said you couldn't complete the game, but I'm not sure if this is one of the missing features or I just didn't see the solution. Let me know if you see this because I'm kind of curious. :D