Does the game have an end or is it infinite?
Very cool game, only issue I have is that the upgrades cost a lot of notes so unless it's a good ability it's not usually worth it. I think they could maybe be reduced in price so that they aren't costing 3/4/5 notes. I mostly just hoped to get a level 5 upgrade in the store or I just didn't worry about it.
Is there a way to have every slot have an ability? Not super clear to me, because once I had lvl 5 scatter shot, I didn't want to risk it getting replaced and the though never crossed my mind.