Really clever game. The two worlds thing is such a cool brain trick, and the way you reveal it with the mouse swipe feels really natural once you get it. The rewind is already a great design choice; it keeps the puzzles snappy without turning mistakes into a whole reset/redo chore.
Also, the axolotl is adorable. The animations are super clean, CRT effect looks awesome, and the level design does a good job teaching without dumping text on you. I'd 100% play more of this if you ever add more stages, seriously.