Very nice game
I've read about this game a blog, and have wanted to try it out for a long time (alas, i could not play the beta for free, and dislike paying - lol).
Having tried it, I must say I really liked it. The challanges were hard, but not too hard and having played each a few times you were bound to get it right, also, the high amount of checkpoints makes it easier, since you're able to save your progress when a challange is overcome.
The music in the game is also very enjoyable, and I usually mute about 19 out of 20 games i play, however, I didn't in this case.
Thumbs up for a great game! :)