Best game I've played in any jam so far, the mechanics just work so well, and damn the execution ! The art is lovely, the music perfect (reminds me of angry birds theme).
The real genius here is the level design, you did a really good job introducing each new mechanic and slowly ramping up the difficulty. And there is a lot of "real" levels (not tutorials), which is impressive for a 48 hours jam (I struggled to make only a few in my game).
The only disappointment is the lack of undo button.
Great job !