The music is psychologically disturbing. I'm serious, I couldn't play this 10 minutes with that music. It sounds as if something is off, wrong, you're in the wrong place, doing a weird thing, obsessed like in a horror movie or something like that. Not quite what a relaxing casual puzzle game needs imo. The technique to make this game is interesting, but the game itself isn't that much. Most puzzles are hexagonal symmetric, so it's always clicking the right shape 6 times.
But anyway, thanks for sharing this! I found out about this game via a Steam review you wrote. I liked your review and checked out your profile to find it.