That doesn't seem like the solution. Are you sure you're talking about level 38? It's starting to seem impossible to me, too, even with your spoiler :(

Apart from that I really like this game- it's simple but challenging and looks good, too. I've played other similar ones but this one just nails it for me.

The only thing I would add would be a reset button - having to spam the undo button to get back to the start position is mildly annoying