It's also really interesting to see how well the game guides the player to goals. When I was a kid, it was such a brand new, wide open experience that the game felt huge and there were certain challenges I could never figure out on my own. Now, with decades of playing 3D games, it's easy to see how well guideposted the game is about nudging you in the right direction. Even the 100 Coin Challenges aren't too bad, if you play through all 6 stars on a level, it has already shown you all the areas of the map so you remember where to find coins.It really is remarkable how well Mario 64 codified the 3D platformer. It's like everyone struggled to figure out how to get their stuff working in 3D well, and Nintendo's like "BAM!" First try.