I think I managed to soft-lock myself on the puzzle right after the little town area. I tried to set the rocks to built a hill but fell off and then couldn't get out. I'll give it another try later, but it was a pretty neat little puzzle game up to that point and I'm curious to see where the story is going.
Thank you so much for your feedback!
Usually with these puzzles you should be able to aim at the rocks or the puzzle itself to get into the "building" mode again in case you soft lock yourself.
But I will definitely try to find a way so you won't be able to soft lock yourself. Again, thank you very much! :)