This is a great puzzle game. I gave up on level 9. I could get everything but the pyramid. I don't think I ever understood the rule for the rail road tracks. something about doing all the tiles in it's row or column but the exact reason some orders worked and some didn't never gelled for me. I thought I understood the pyramid rule after it's first appearance but then I couldn't make it trigger on 9 so I guess I didn't.
The tutorial section was well done, effective and clever and respectful of the player.