Awesome puzzle game! The visuals were nice and the music immediately put me in the puzzle-solving zone. The puzzles themselves had a nice difficulty curve that kept me engaged all the way to the end. I was able to solve some of the levels without using up all the allotted moves, so it was cool to see that there is some room for different solutions.
All of the concerns I have were already mentioned in the other comments, though I do want to reiterate that the UI could be a bit bigger, particularly the hints at the top right corner.
Nice work on this submission! It gave my brain a nice workout.