Okay, it seems to update, just not play an animation when clicked. If the price and upgrade amount still update when clicked, it should still work.
For some reason, I can't press most of the button and nothing happens after the upgrade.
Alright, the code has been updated. Should work now, and a "BOUGHT!" effect has been added to have easier clarification.
By the way, there is now an endgame, technically. Although I need some more time to make a end screen, the current endgame is 1.00e100 fish. I added an exponential upgrade at 500 MF to incorporate this new number.