well, this dosnt count... but do try 'shooting gallery' for the sega master system emulator. i think i had to use freeze sms to get it going with the actlabs gun - but meka might work with it by now.
the game consist of many rounds where you have get a certain number of targets to qualify to the next round. Each level has simular elements - but in different order... count, direction, speeds..ect. It gets sickly insane. In the later stages.. youll also see some different target types... though ive never gotten too far into the game because of its difficulty.
Its a real challengs, and a real blast of fun : )
As for pc games... you might want to look at some of the flash type games that are all over the net. Ive not seen many commercial games that use guns.