turns out those non-working games were a mix-up on my end

README.txt

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-Stuff that currently doesn't work:
-
-* Some games don't work
-
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 Stuff that I might fix:
 
 * Sound may be a bit off, but I don't know if that's just my ALSA drivers or
   something with the core.
-* SA-1 games are slow, could use some optimization.
+* SA-1 and SuperFX games are slow, could use some optimization.