Almost all games work at 30FPS with sound. In fact, the renderer
is artificially locked to 30FPS (frameskip = 1).
Without sound, I benchmarked between 50-60 FPS on most games. You
can disable sound, vsync and frameskip to achieve these speeds.
Sound works well, but is subject to some artifacts. If game speed
drops below 30FPS, sound will break up.
Save games are implemented, but you need dcload and a PC to take
advantage. I.e., vmu saving is not supported. Full sourcecode released.