Are there any pictures or video of it running? I understand why they are not on the GitHub page
here's another video that showed good gameplay shots that I happened to see last night.
https://www.youtube.com/watch?v=kscCFfXecTI
The distorted textures and weird triangle clipping issues are exactly what you'd expect from an unoptimized port to a platform that doesn't support perspective correct texturing or depth testing.
It looks pretty decent but seeing the texture warping and glitching reminds me of why I was team N64
The N64 definitely has the nicer GPU of the two. An N64 with a CD-ROM drive would have been amazing.
And a bit more texture memory!
The whole thing about the texture cache being the worst design decision in the N64 just gets parroted so much, but nobody can cogently explain which corner should have been cut instead to fit the budget.