This is GREAT sokoban(-like)! I played lots of them, believe me! And now it sits at 2.91! SO underrated! Puzzle-Level design is just one of the best on Kong, really. One issue is animations: too slow, clunky game-feel at first, good reference here might be Sokobond - everything is just quick and sharp, including rewind... UI is also needs lilbit of work.. 5/5 overall though!
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Hey Thanks! Where are you running the game? The best performance is in firefox, I've heard about some slowness in chrome (may be that?).