Cute. I like the idea and love the music arrangement.
Gem combining seems bugged. Usually, nothing happens, but sometimes a random gem on the screen will combine instead of the one I'm pushing.
Thanks for trying my game and for the feedback! The gems should combine to a larger gem when 3 of identical gems are adjacent to each other. Sometimes the gems spawn close enough for them to combine so it might feel random. I wanted players to have fun "discovering" the mechanics, but I guess I might have hidden it too well :)