It definitely feels “heavy” on mobile Safari. The animation is buttery smooth, but the little space station thing doesn’t rotate as quickly as I feel it should based on my scroll velocity.

I feel like I’m alone in not liking it. The technical accomplishment is undeniably impressive, and the author deserves serious kudos for that, but I really wish websites wouldn’t do this sort of thing. It’s far less usable than just having some static tables.