"Race" doesn't seem to work at all (it doesn't start) and when music plays in the games it sounds laggy (try James bond 007), but that could just be the atari :d
Most of the games I tried seem to work fine though.
I see... Sometimes there is a problem with the ROM format autodetection. You can always set or try the various ROM formats in the Settings Dialog and see if some one works.
"Race" is particularly an ultra-rare ROM. One of a handful of games that use the "Drinving Controller", a special device which is not supported by the emulator yet.