This is such a polished game! Very beautiful implementation of this idea. Probably one of the most beautiful I've seen!
One piece of feedback I would give, is to take away the time limit. The only thing it's going to do is it will make you start again from the beginning. In puzzle games, you often have to sit down and think for a moment. Players will do that whether there's a time limit or not. They will just restart and then try the solution they came up with. Time limits only really make sense when there is a real consequence for failing it.
Would be cool if you could also check out our implementation of the same idea! :)