Thanks! There's some explanations in the devlog linked above, and some more examples in the hack documentation. At the moment there's no way to 'undo' a move or 'reset' a level, which is quite limiting for larger games unfortunately.
Thank you for the support :) I know a few folks have given it a go but it's not the easiest thing to get working and still requires some file edits, so probably a few barriers for some. When I have more feedback I will try to make the process smoother. Excited to see what you make with it!