Also found another issue. I was trying to make my new game (GD2600, essentially a port of GD for the VCS) and sometimes when I just moved around the

placing block board, the sprites' frames were reset to default and the backgrounds auto-deleted themselves, only remaining the default background. But the code (thankfully) didn't get deleted along with everything else. But I think you should also fix this issue.

Original post:https://itch.io/post/12429395