Excellent!
The eerie music kept me glued to the game the whole time, and it was just fun to play. It wasn't crappy like other games like this, where a difference was a different colored pixel. The differences are easy to find, but the game is still hard. But one question though. When the guy got knocked over, what knocked him over? Or was it a heart attack? I know he put his hand to his chest but that could be cause of shock or whatever. Great game.