Have you per chance played islands of insight? This game reminded me of one of the puzzles there, but yours has a lot of interesting twists on it. I really like it.As a side note, that rock grinding sound really scratches my ear, I love it.
No unfortunately I didn't play it. But I did a search and OMG it's so beautiful! Thanks for your time and heartwarming feedback ^^
Yea it scratches my ear too :)