...but the problem is that the version that wasn't that bad never actually came out. Instead, we got the disaster that rivals Custer's Revenge in quality. But yeah, apparently a few years ago a beta of Superman 64 dating 20 months before the final release was leaked on the Internets and here is a video footage of it in action:
https://www.youtube.com/watch?v=3JHCn3THgGU
Apparently, what happened is that 1 month before release, licensers ordered Titus Software to redo most of the game from scratch, so as they still had to meet the deadline, the final result is what we got and it's so bad that even Electronic Arts would like to remake it.