Thanks for playing my game! I agree an undo function would have been good, I just didn't have time to implement it unfortunately. And sorry about the unclear weight rules, I'll keep your feedback in mind if I ever decide to make a more polished version of the game.
I liked your video, it was really fun watching you play. But also frustrating when I realised some of the puzzles could be solved in a way I didn't intend! Still, glad you got some enjoyment out of it. :)