A well-polished puzzle game with a unique central mechanic that fits the theme perfectly, what a refreshing experience!! The whole game is executed very cleanly, from art to sfx to little bits of polish like the score text popping up after a round; it all feels like a ready-for-market mobile game already. It took me a minute to understand the mechanics but once I did there was a decent amount of depth to them. I don't really have any criticisms it was just a fun and well polished playthrough with the right amount of complexity and approach-ability. I think there is some decent potential for a mobile game here. Maybe adding progressive difficulty like 5x5 grid, a tile that is squashed if a rock falls on it, etc could help add more variety to the game. Really nice entry, keep up the great work!!
edit: I also really loved the colors/background, the presentation is great