I guess this game would probably work better if there was another player playing as the Demon King (or alternatively having the characters targeted when the demon king rolls a 4 be determined by some other dice rolls instead of letting the player choose who gets hit), and I guess that it might be worth giving the demon king a different thing to do upon rolling a 6 if the Murder Soda is already gone/being destroyed. And the Knife Lady's 'make the demon king re-roll' did sometimes make it a bit harder to keep track of everything (especially when using a pen instead of a pencil because, y'know, re-resolving the Demon King's new attack)
But, besides those minor nitpicks, this was a pretty fun game. Was it 'so bad it's good' though? Not sure. But it was good.