I enjoyed all of the menu animations, the sliding menus really fit in thematically well with your game. The puzzles are fun and the use of timers with movement really creates some puzzling situations that I very much enjoyed. The puzzles having a score feature adds a lot of re-playability to the game in a very compelling way. The open boards made a ton of room for experimentation that felt very natural and added to the puzzle feeling.
If you wanted to improve. Some form of "perfect score" would be a nice addition to the game, I saw there was a deduction but had no real understanding of how it worked. I also would remove the death counter effect on score, while interesting to know, it's easy to cheat the game simply by dying a few times until you figure it out, then redoing the level to get the better score.
Overall fun game! I hope you take this idea and expand on it some!