I am growing increasingly frustrated with trying to run NES games on my Q.

I've followed steps from other threads to download and install Pocketnester and a couple of roms. After setup to change screen to landscape, assigning controller keys, etc., I can launch a game - Space Invaders for example. The game appears to start, but I have no sound and no control over anything. It's as if it is in Demo mode. I've tried uninstalling/reinstalling Pocketnester but still no luck. Surely someone out there has had a similar experience and been able to rectify. I would appreciate any help.
I don't know if this matters, but I've placed Pocketnester and the games on my storage card, not directly on my Q.
Thanks.