I don't really enjoy such a minimalist art style, but the juiciness you put into your game makes up for those big pixels in my eye. The puzzles felt clever and very satisfying to solve, but being able to lock yourself out of the solution without the possibility to restart just the level made me give up before I reached the end (I know I can reset the full game and I did it, but I was not going to redo the whole game 3 times for a mistake I might do again 10 minutes later).
Another pet peeve I have is that I really dislike the tile by tile movement. The trail and smooth camera are nice, but the jerky movement made it unpleasant to me.
I'm just nitpicking though, overall this is a great entry, with the best level design I've seen so far!