Hey mate. Ive tried playing multiple times its still broken. seems to happen right after level 100 when the black bricks start to appear. random amounts of my balls start to spawn from a spot in the lower left corner. they slowly spread in a circle from this corner not moving right. THANKS
It looks like when that happens, the balls lose all their speed and just float around slowly. As far as I can tell the only way to fix it is to by a new ball, at which point all the balls speed up to their correct speed.
After a while of idling, 90% of my balls are just crawling around on the screen and progress stops. It makes it so you can't run the game idle, you have to always be playing.
I also noticed that when I buy speed upgrades, they aren't actually applied until I buy a new ball (doesn't matter what type).