Hey, that's a very cool game! 😎
It kept me hooked until getting all the stats to 100%. I see we can totally continue, but at this point it becomes a little bit repetitive.
Only one comment I'd have, is that the game tends to slow down when left running. I think it might be a late-game thing, with the amount of miniballs being spawned.
I work around it by clicking the upgrades and going back, making the balls respawned. But it might be worth getting fixed.
Good work!