Really fun concept and reinterpretation of 2048, and great execution. Feels like a complete game.
Balance wise -- I think the game is a little hard to approach -- it took me several tries to scale past 2x2. I don't know if tile spawns are completely random or not -- regardless I would suggest adding a mechanism that gives the player what they need more often.
I seemed to always be getting stuck with a ton of rocks an no way to deal with them. Especially in the mid game (which is about as far as I got), nothing but paper removes rocks, and everything seems to remove paper.
Theme match is OK -- I like the scaling board, I would have preferred if the game somehow leaned into that a bit more. Maybe by having tiles of different sizes as things scaled?
Overall, the quality here is high, and I really enjoyed it. Very solid entry.