A couple of questions:
Will it be possible to access the Retroarch quick menu using a different button combination at some point? It’s fairly cumbersome to try and hit both start and select on my Vita, given they are flush with the faceplate of the system. Personally, I preferred the other method of L+R+Up+Triangle. Much easier to hit and unlikely to conflict with a given rom.
Are there any plans to bundle each of the emulators/applications within a single velf?
Is it possible to scale the image 2x rather than filling the horizontal resolution of the Vita screen? It would be nice to have the option to have pixel-perfect scaling without needing the bilinear filter for smoothing.
Other than that, save states appear to work for me in Genesis Plus GX and Gambatte, FCeumm seems to run fine, and I wasn’t able to get Dosbox to run the last time I tried it(I will continue testing with the newest version in a moment).
*Edit: Dosbox loaded but crashed on trying to load an executable. Handy loaded Electrocop just fine(ran too fast), and crashed when I tried to load Ninja Gaiden 3 right afterwards.