Definitly a very Cool Game! The Soundracks are really good!
It is very challenging which I think is very cool. Most of the games are very easy to complete.
That said, I need to point out Keyboard Layouts...I tried playing the Game with the Keyboard which is quite hard when the "X" and "Z" are not located next to each other ...
If there is an Option to fix this, the Game would be even better, and it is already verry Good!