Slay the Spire, unlocked, on Ascension (difficulty level) ~5ish, just through Act 3, should work, I think. Definitely doable in 2 hours by a new player but I would expect fairly rare. Too easy to just get lucky without upping the Ascension from baseline. Can be calibrated; A0 is too easy, A20H is waaay too hard.
Slay the Spire, unlocked, on Ascension (difficulty level) ~5ish, just through Act 3, should work, I think. Definitely doable in 2 hours by a new player but I would expect fairly rare. Too easy to just get lucky without upping the Ascension from baseline. Can be calibrated; A0 is too easy, A20H is waaay too hard.
Point of comparison: Slay the Spire consistently takes me ~3 hours. (I have a slow, thoughtful play style.)