I was reading about sliding wood puzzles recently, and I had some time to kill this afternoon, so I made an implementation of Dad's Puzzler. A puzzle where you must bring the top-left block(2x2), to the bottom-left by sliding things around.
https://git.sr.ht/~rabbits/uxn-utils/tree/main/item/gui/dads/dads.tal
This is the original instructions.