On this topic, I've ported WakeBreaker to the Touchbook AI OS (similar to the Pandora, same hardware) .. WakeBreaker is a very nice, light, simple, C++ game demo that gives you all you need to get started - 3D graphics, user input, a basic game engine, and so on..
If you want to check out the sources, here they are:
http://w1xer.at/touchbook/tbWakeBreaker/index.html
These sources will build on the Pandora too, although I haven't tested it yet, for obvious reasons. But I'll be updating the code as soon as I have a real Pandora to test with, so that anyone who wants to get started with writing/hacking a 3D game with C++ *on their Pandoras* can do so, pretty easily.
There is nothing complicated in this game demo - its a very simple game, but it has everything you need to get started with understanding things. You can learn a little C++, learn a little OpenGL ES 1.1, gain an understanding of things like reflection, model transformations, user input, particles, elementary physics, and so on .. and once we all have Pandora's I'm sure this codebase will be used for many, many other things by those who just want to get started with a basic game themselves ..
EDIT: I'm an idiot .. I didn't see that this was for the Dingoo A320 .. sorry, got Pandora on my brain. Obviously, I'm talking about the Pandora here ..