I played this with someone and as the scientist I had great fun running around, trying to get keys and getting lost. Sadly as the ghost he had a less enjoyable time as he was either running behind me at the same speed, or just waiting around a corner for me to run into him. Perhaps giving the ghost more to do if there are less scientists would be something to concider?
The game looks and sounds great, although I did notice that once I got the warning sound at a certain point is stopped getting louder, so I walked around a corner into the ghost (which made me jump and made both of us laugh a lot). A really good prototype, I hope you continue to develop this as it was really good and shows awesome potential