One feature I might ask that past a certain number of resets, lower-tier imps start to become automated. It gets to a point where you have to click the upgrade button a whole whole lot, and on top of that, the game usually feels like it can make some measure of progress while I'm AFK, except right after a demon reset when I have to sit there and do a bunch of upgrades for like fifteen minutes or else production is just massively underpowered till I get around to it.