So, overall, super cool little game. I like that you control all squares in an "infinitely" embedded sequence of levels, and how you have to solve puzzles by pulling squares from different levels of the embedding into upper (or lower) levels. Sometimes you even have to take advantage of doubly-embedded levels to duplicate the number of squares you have available! Super cool stuff. How does one even come up with this stuff?
The one thing I kinda absolutely hate is the physics engine is far too slippery and getting to the goal involves more trial and error than anything else, even when you know the solution. So yeah.
Unfortunately, it is way too easy to break the game on level 15. It just keeps flooding squares into the level until it lags too much to go on.