Super polished game! The scene transitions are great!
I think all of the music and SFX are great, and match the game perfectly! I do wish the sound for hitting a hex with the correct ball was a *little* louder/more rewarding, but it's definitely still really solid.
The visuals are really simple, and the game doesn't require anything more than that, so I have nothing bad to say here.
Game Design overall, I think, is again, solid. My only qualms are that the game feels maybe a bit too fast paced/hectic, and maybe balls should start off spawning slower, than ramp up over time. Additionally, two balls colliding basically seems to stop their momentum entirely, when I expected a really satisfying recoil from one another.
The polish is fantastic, and really ties it all together really well! Great job!