I bugged it! https://streamable.com/5n3rus the ball stays in the corner.
This was a fun game, I can't quite understand the score mechanics. It seems the strategy is to refresh a lot and buy cheap balls (there doesn't seem to be a use in buying more expensive balls if they have the same stats), and use the crit ball when you have a clear shot of the crit ball multiplier and there's big multipliers below.
I managed to get 3459 as a score, but this game feels like you need to grind a lot to finish it. Hitting the platform ball below is not easy!
If the refresh/crit multipliers spawn too close to the ceiling of the screen, it's really hard to get them. I think you could've made the ceiling a bit higher than the launcher in order for us to apply more power to certain angles in shots.