From what I've played so far, so good.
1943 works well, a lil slow at 500MHz, does this game have a Dive button? couldn't get the plane to dive after configuring buttons.
Arkanoid w/ Nub, a little slow, with DPAd its easier.
Asteroids, a lil slow @500MHz, makes some funny noises
Berzerck, nice response time from the Dpad makes this appealing to play for once
Carnival, fun like the old days
Centipede (crazy cool with Nub),
Crazy Kong, Dig Dug, Ladybug, all work pretty well. I've been playing the older games at 500MHz.
Commando, would be better on 2X scale, a little too tight on this display IMO
Double Dragon, bumped speed to 750MHz, too slow, not overclocking higher than that ATM
The buttons have to be configured everytime you go into a game, as I've not found a way to save the settings. It would be cool if the Nub could be a joystick instead of the DPad, but the nub's only worked on Centipede so far that I've found. With this in mind, I went through and was playing games you didn't need to configure any buttons for because buttons weren't needed, like Ladybug.
If the MAME (2x Scale) worked that is included, it would be much nicer to take advantage of the screen size plus should have a nicer feel control wise because everything won't be so small & tight.
If the buttons could be configured and saved for the Pandora would be a suggestion for someone looking to improve this release. MAMA 2X Scale would also be nice, hi-score saving, & save states if possible. OK, got that Santa Claus?
Peace & cookies,
Link
PS I'll add more to the list above later today with feedback.