I recently (less than a year ago) released a native port of SM64 to the Nspire CX series using its decompilation, but I never really advertised it anywhere and it didn't get much traction. I was told this is a good spot to spread the word about it, so, here it is!
The performance does suck quite a bit, but from personal experience, it is playable, and, dare I say, enjoyable. Realistically, on a CX II, you're looking at about a 4 fps average with reduced resolution, as you can see here. Whether that's good enough for you, you'll probably just have to find out.
What is annoying is I can't just release the application as a .tns due to copyright stuff and using the SM64 ROM, so to play the port you'll have to compile it yourself using a ROM that you definitely cannot find with a very quick google search. There's also a youtube video covering the installation process because it is usually pretty annoying.
WARNING: I did kind of hack this application together without a wide expanse of knowledge about the SM64 decomp, Nspire development, or programming in C for that matter. So far I've tested it extensively (got bored in class many times) on my CX II and have never found any extreme hardware-affecting issues, so you'll probably be fine, but, use at your own risk I guess. There are also a few known quirks that I can't seem to get ironed out, and it is possible performance could be improved, but it would take someone with more experience than me to improve the project at this point.
That being said, you can find the github with all the info here:
https://github.com/rayzerbrain/sm64-nsp
And a quick proof of completability:
