Bit Generations: Orbital works exceptionally well on my n810. Since the only controls for the game are two buttons (literally), the on screen tapping controls are perfect. One button "attracts" and the other "repels". That's it. It's a great game though. Now it's available on the Wii too, through Wiiware, with slightly updated graphics.

A video of the gameplay can be found here (note that this is just showing the game -- it's not running on a tablet in the video!)
http://www.youtube.com/watch?v=YTktCOAxxQg

Some of the other Bit Generations games might work well too, but I haven't tried them yet.

I've found many GBA games run well on my n810, but are unplayable due to the controls. The d-pad isn't really designed for gaming, and the on screen controls don't work well if you need to press the d-pad and a button simultaneously.