Very nice addition to the collection of idle games. However, it does get very slow if you reset the game after having defeated every campaign level. I would suggest maybe adding an artifact that would let you revisit campaign levels but with a lower reward? Otherwise, if you've reached that state, the only way to get a feeling of progression with the money again is to hard-reset. Also, i would suggest adding achievements for a sense of completion. Maybe a different looking final boss as well. I might be wrong though, maybe idle games aren't meant to be completed.