3 questions. Dreamcast background stays and I can hear game behind it.

[5solas]

Ok I have a two issues so far.   Just got a hyper spin drive.   Mane games or these older arcade games run at super speed.  
 

but 2, when I click on a Dreamcast game it looks like the Dreamcast emulator is launching, but it just stays on the Dreamcast background picture.   I can’t get rid of it.  I can hear the spin wheel behind it.  I have to restart my computer because the Dreamcast logo background screen won’t go away.    
 

ive tried this hyper spin drive on both an i9 3080 pc and a 3900 Ryzen with a 6900xt pc.     
 

last question. How do I enable the nunchuck for switch games?    Thanks.