Both your video on the creation of the game as well as Mark's playthrough were both really entertaining. It was very fun and enjoyable to play through myself as well, even after knowing parts of it already.
One small nitpick, the periodic table poster in some places is outdated(?). 113 — Nihonium
115 — Moscovium
117 — Tennessine
118 — Oganesson
Overall a great experience. Thank you for making it!