Nice! I think it's a good concept, I would have liked to see some more control over the speed of the playback (it's painfully slow right now), and the controls seem a bit flaky (I think if you put two gates directly on top of each other and try to connect the outputs to the input, only one gets connected and you're left with a straggler edge, for example). It would have also been nice to save which level you're on; this should be relatively easy with godot, and especially for puzzle games like this it's annoying to have to replay levels.