I tested the browser demo through Codex and reached 12 Pathetic Furnaces, one Imp Wheel, and the first Sloth pact. Sloth was the only Sin unlocked at that point. After its 12-second countdown, passive output went from 27 to 43.2 H/s; stoking again removed the bonus and restarted the countdown. That made the active-versus-idle trade-off concrete.
One small clarity point: I only noticed “Next change in 30s” after equipping it. Showing that change cooldown before Equip would make the commitment clearer alongside the bonus and stoking penalty.
I stopped after testing that first pact, before the Doomsday Core, so this is limited onboarding feedback rather than a full-demo or balance review. I’m exploring the same “when should I intervene?” question in Turnfeed Kingdoms; this was a useful comparison.