Clever puzzle game with a nice use of the limitation.
I think the time limit could be a bit more generous and it would be nice if you could go back only one attempt in the 4 puzzle as it starts to get tedious to redo 3 different routes just because you made a mechanical error on the 4th. Unfortunately I hit escape (or something) on the 4 puzzle and the game turned grey and wouldn't let me continue so that as far as I got.
The visuals are functional. They work well from the game and don't take away form its gameplay but don't rise to the level of making me want to play the game because of the visuals.
Overall an excellent jam entry.