Upgrades should be retroactive, the fact they're not mean you're forced to play idle basically since there is a price upgrade after each buy, it's so innintuitive for an incremental.
I mean, using few emojis on the ressource required for the upgrades could be better for more clarity,
As said previously, lot of scrolling :/
Gameplay loop is not interesting enough to invest time in the incrementation, mechanics are basic (at the point there isn't even retroactive upgrades) and the end is obvious
Still good for a first project wp.