please don't just multiply the current number, because let's say: the upgrade doubles current tP gain if you buy the upgrade at 1 tP gain: you'll get 2 tP gain now, when your base tP gain is increased by 1... you'll get 3 tP gain instead of 4 this is bad because it makes it situational and can make the player afraid to purchase it because "it might be more important later". i'd recommend using the same "base gain" thing and multiply it by the multipliers of it nico, you are free to copy this to your main project by downloading and then loading it
