Very fun, nice prestige system.
Can I make a small recommendation for the future? Your 'juice' with having the buttons shrink and expand when clicked is great, but whether the effect triggers seems related to the size of the button at it's small mid-click state. The effect is that the button visibly clicks anywhere on the button, but doesn't have an effect if clicked nearish the outer perimeter. Maybe either set the effect to the initial click with a delay timed for the 'juice' resizing/bounce, or reverse the math for resizing the bubble when it comes to the MouseX/MouseY checks to see if the mouse is over the button during the click? (I don't know your code/engine, so I'm not sure which is appropriate.)
Again, I'm having fun with this one. Clear progression, regular engagement, just enough variation in options at any given moment to keep me engaged. Good gameplay loop!