Also there is a weird bug where loading a save state in a Sega CD game freezes the game shortly afterword.
I fixed this by using Picodrive's upstream version. Sega CD games work fine for me on my firmware.
Finally the Pocket SNES and reGBA menu's flickering.
PocketSNES (and DumbSNES) still flicker however, a fix is upcoming that should also fix TV Out. reGBA menu's will still flicker however (although much less than it did before), maybe i should look at it...
Btw, forget about Minislug being ported : it is closed-source and i was refused access to it by the author.
SQRX3, i no longer do ports for retroguru, so you will have to ask someone else. (again, it's closed source)
Unnamed Monkey Game, it's also closed source and not even finished. (i don't know wtf zear & all are doing rn)
MAME4All already got ported : unfortunately it's pretty slow...
The other zelda games : i plan on porting Zelda Picross (my GCW0 port) to the RS-97. No plans for the other games.
Everything else sounds possible. Note that i need to port back SRB2 again to my firmware to a bug with musl...