Thanks a lot for the feedback!
By the way, I just uploaded a version that adds infinite mode, so in Balatro fashion OP builds can brag about how far they went!
About the balance, yeah, some tuning down is definetively needed - charge being in sets multiples of 1 full second.
Once mechanic that I want to add is "for every x, y happens". So for example, "for every 5 hastes, reduce the colldown by 1%", or "for every 100 heal, a unit gains 10 power", "for every 100 damage, 2 poison (as like 'bleeding')". That would be similar to the overheal and "haste when alread hasted" mechanics that the bazaar has, but in a more generic way that also applies to any effect.