Thank you for playing. :)
If you don't mind me asking, what graphics card do you have? And did the Tilemap glitches appeared in all levels or just the ones where the camera moves?
Of course, you don't have to share that information if you don't want to. I've had trouble with TileMaps in Godot before and have read that it might have to do with specific graphics cards. I'm trying to understand the problem as much as possible.