AWESOME. Graphics and music are omg so cool. I really like this kind of puzzle games a lot. It has a very cool retro touch. The only bad thing I can see here is that the control using the mouse is a bit unintuitive, and at first I didn't know what to do at the first room as @Kim, but as soon as I read instructions, everything was OK :D The movement was a bit weird when entering the doors, but overall, just an awesome entry.