Nice little Baba-like you've got going there! I really like games that do a lot with so little, and I think this minimalist approach can go a long way. Even the music is extremely simplistic and repetitive, but while trying to solve the puzzles you just drown into it.
Might have been total randomness, but I somehow spent a lot more time on level 2 than 3 and 4.
Keep up the good work, this could for sure yield a great ROI on you time!