nice start.
i have a general incremental game tip:
when upgrades jump up high in price after every upgrade, then it takes away choice.
because one upgrade will cost 5million and the other only 500k, for example.
i guess more increments before reaching a maximum upgrade level can negate that, but even then keep the price changes low.
that way players can choose their way a bit and have their 'own build'.
focusing more on active or passive upgrades becomes more advantageous then.