Cool and innovative concept and really good graphics, animations and VFX. The game was really visually appealing except for the fact that the blur effect was extremely annoying for me (maybe add an option to turn it off or on). What bothered me the most was the fact that the balls would get stuck frequently while trying to get on top of the buttons making it hard to control both of them. UI was simple but maybe too simple (would be nice to have some more style to the buttons and more options) and the control buttons on the bottom of the screen were way too big. Also, the camera used to clip a lot in the ball so it would be nice to add some camera collisions as well to avoid that.
Anyways, despite all these little details to fix, the game is really good in general with amazing graphics and a really cool and original concept. Level design was also interesting and you nailed the theme aspect of the game as well. Congrats on finishing the game and good job!