Excellent level of polish as always :) Art, music, and overall presentation are top notch, and a cool concept too!
Some of the earlier puzzles I think are cheezable, I beat several without using any boxes even though there are boxes in them. The pathfinding of the mice is quite abusable once you figure it out (though figuring it out was also pretty fun). But the last few puzzles were very enjoyable 👌
The controls were pretty solid, but I did find it a bit annoying that it was possible for you to break the box. It does make sense and adds a bit of need for caution but given that (SPOILERS I don’t think itch has spoiler text) several solutions involve shuffling back and forth to block the mice in a repeating pattern, it’s a bit annoying when you accidentally hit the box while doing that, and it doesn’t really add anything to the actual puzzle. Very minor grievance though. Well done!