An excellent take on the soko-ban genre with top notch level designs - starts fairly easy, but that last level is a doozy! :) It was very satisfying to finally figure out the solution for that one.
Thank you for adding unlimited undo support and thus eliminating the only source of player frustration :)
I would’ve loved some audio and some variety on the ground tiles (partially for visuals, partially for signifying tile boundaries), but this is a very solid entry nonetheless.
Congratulations!