Woah, thanks for all the feedback and thanks for playing!
1) That's an interesting idea, I'll look into maybe adding more pegs on the board that block you from hitting 1x, 2x, and 5x as upgrades.
2) Yeah, costs do get high very fast. I'm currently working on a prestige system, so the game balance is built for a prestige system, without the ability to prestige so it's way harder that it should be.
3) By unique textures, do you mean like skins and design? Or would that also be balls that ware worth more than just $1, $10, and $100.
4) But saves are hard.... (I'll get them is as soon as possible lol)