the game just needs more content as there really isn't much you can do, even for an idle game. that and the fact that the game stops if you're not focused on it makes it only get 2/5 from me.
now he has made it that you can in fact get the miasmal chalice if you leave a temple but the monsters spawn less often, so you might as well get it while you are there. gain a level before tackling the boss or something. besides, it saves trekking there again.