Flee for this price! Good game but much too short ...

I bought this game yesterday and I just finished. There frankly to break everything up to 2h big game spread out over 10 levels.
The game is very well done, the concept is very nice and original. Unfortunately for this price it's a big joke. They offer additional 8 levels to 1.79, the game is already at 2.99 is abused.
I still set 2 stars because the game is good but otherwise it's very disappointing ...