I love the design of the puzzles. Some of them are really clever and require you to think on how many blocks you actually need to complete the puzzle.
The puzzle and camera view reminded me on Captain Toad Treasure Tracker.
The only personal issue I had is that I kept thinking the red outline was going to be the starting position instead of the filled square.
I believe this is something I had trouble with, because I haven't seen other talk about this.
Would love to see more levels and maybe a way to rotate the camera around the level, for me it was sometimes difficult to tell how many yellow blocks were stacked on top of each other.
All in all very neat game =D