I just played your game their and its great by far the best game I've played yet from this jam. The gameplay is simple yet fun, the music and sound effects fit nicely (freesound community be carrying my games to), the visuals are great they all fit together well and suit the style of the game. The UI is also great its intuitive and doesnt get in the way which is impressive and its something I struggle with quite a bit. I like how you implemented the theme and the special object aswell.
The itch page was well put together which is something I always appreciate as alot of people dont put effort if any at all into their pages for game jams.
Although I did come across some bugs/unfinished systems. Sometimes the gems would get stuck on the wall on the righthand side of the game. Its not a big deal though and its something that can easily be fixed. Also Im assuming its just because you ran out of time but I was able to buy all the upgrades at the start of the game. I even tried realoading the game but that didn't fix it so I'm assuming its not a bug.
Overall I think it was a very unique idea and its not like anything I have played so far I can definetly see this as a fun mobile game with a bit of polish and improvment.