THIS GAME IS FREAKING AWESOME.
I have to say that the original game is kind of boring. It controls well, the graphics aren't that great, and I don't play it often.
The evil version is AMAZING!! At our school, teachers, students, and basically everyone is wondering what we're doing. We walk through the maze, trying to avoid the demon. If we're really lucky, we'll find salvation.
Otherwise, we scream our heads off when we see the demons. It's really fun.
Get this game now, the original isn't that good, but if you've got some friends, then you can always try the Evil Version.