Sorry to hear that you're running into issues with it! Did you encounter these issues with the Itch version? When you say you copied files over, which ones were they exactly? Could you describe the glitches you're seeing? It would help me track down what the issue could be.
I'll admit I've not built this game on the latest Playdate SDK, so it's possible that might be the culprit. I'll do that today and see if I can reproduce any weirdness on the device.