Amazing work, redguy!
Every SuperFX game runs for me.
I'm using a Rev E2 SD2SNES on an SNES mini console.
Dirt Trax FX had garbage over ~1/3 of the screen two times I ran it, the third time loaded fine.
Doom has random flickering pixels all over the wall textures. I've tried rebooting a number of time, doesn't seem to help.
Yoshi's Island booted to white dots instead of the intro text once, and every other time it's booted up fine.
Winter Gold froze at the opening Nintendo screen once, booted fine the second try.
The SNES Classic Star Fox 2 ROM, the Star Fox 2 beta and its translations all work fine for me, too.
Other than that, the worst thing that happens is slowdown. Not bad for a first beta release!
Here's a video I made showing the games running:
https://youtu.be/AabQN5EhrSI