Fun game! I like the mechanics and UI is nice. Good idea with "puzzle not longer solvable", because I would not notice that and just waste time.
Since this jam is all about progress and working to improve a game, I'd like to see more devlogs.
As per feedback for game, it would be great to see how I stand against other players - I can see only my time and my position, but I don't know how many players played daily challenge and what's other players scores.