I didn't quite understand the mechanics and found myself winning by using trial and error more than I should have. It looks like it could be interesting if it was a bit more clear what was going on though.

Unfortunately I felt completely overwhelmed by the 2nd level and resorted to complete trial and error. I see how it works, I just couldn't mentally process it. I would recommend changing it so it's a series of 3x3 and 4x4 challenges, which lead to different exits, which connect (in a non-interrupted way) to other challenges. So it's like a maze with puzzle pieces in between. That's just an idea though. I do like how it looks and the transitions and "blocked path" indicators.