Addictive! Good song choice. 

As Racinak pointd there's something weird in level 4 but it's totally finishable if anyone wonder (but dunno how many level because I didn't count ^^').

The simple princple of rotating the level and finishing it, played it and finished in something like 5 mins, was fun and calm. Not too much rotating making me wanting to close the windows, needs a bit of polish and things like that but the game works and is pleasant.

Well done (and yeah, get some sleep :p!).