Definitely, Issues or PRs would be splendid. Though, I've had a hard time finding similar essay-like deep dives that fit this pattern on https://explorabl.es (I see a lot of what seem to be just an individual specialized simulation, games, or traditional e-learning courses), and the Space Elevator page feels like more of an interactive visualization in my opinion (though still very cool)

Yeah, I will be on the lookout for high quality ones that match the level of polish and depth as the ones on your repo before submitting a PR.