Not bad! I actually liked it. It's fun, it has solid progression, satisfying gameplay, here are a few notes:

-I wish it had a bit more personality, like instead of balls they're "atoms" in a vacuum chamber. It's better to feel like you're some sort of nuclear engineer bouncing atoms and breaking levels of containment than some guy bouncing balls inside a circle.

-It's too clicky, maybe add some sort of auto-bounce to the mouse pointer so instead of clicking as soon as the ball touches the pointer it's assumed it's a click. Otherwise I had to start my autoclicker to make it bearable. I'd argue it would even make it more fun.

-Balls only seem to bounce up? Is that a design choice? Have you considered bouncing it in the direction the bounce force is pushing them?

-Small bug, translation to spanish doesn't work at "Idle Simple" and "Idle Spiral", it says "Claro" which means "Clear" but like in "Crystal Clear" not in clear like "erase" which is something like "Limpiar" or "Borrar".

-The "right click to move" didn't seem to work for me, 4 arrows would appear but if I drag nothing happens, maybe it's something for the steam version? I tested it on itch.

Other than that it's a cool game and I know it's targeted for windows but I'm sure it would make for a great game if you port it to mobile devices. Good luck!