The level design is super clean and taught me the mechanics effectively. The levels just get better and better! I had to stop and think for each one, and it was satisfying to make a plan and execute it! I liked seeing a vertical loop section in the last level and immediately understanding what would happen there without needing to reach it yet.
I also appreciate the clever diagonal corners in some of the rooms, probably to avoid boxes getting stuck there. It was almost like a tiny hint that I'd need to push the box off in that direction.
I feel all warmed up and ready to dive into more of these puzzles--so sad that it was already over, but excellent work!