Graphically is very nice and the idea behind it has a lot of potential to become an intriguing puzzle game.
The loop concept you wanted to offer is interesting but some “constricting” rules should be added, or at least more game states, to prevent the player from cheating (although it was becoming fun to find out how far it was possible to do so ahahah).
Finally, I too encountered problems with the web ui, both in windows andand in fullscreen