Hi, I received my Thumby yesterday and decided to try to quickly hack a game together.
I just finished a 1.0 and posted it to the arcade (
https://github.com/JensRupp/TinyCircuits-Thumby-Games/tree/master/WallRacer )
It is kind of a Tron game using a virtual scrolling screen.
I am not a python developer, so the code is probably not so nice, but it works and looks cool.
Since only left and right direction change are required I put "left turn" on all direction buttons and "right turn" on A/B buttons. That makes it really well to play.
There might be a multiplayer mode in the future, either on the same thumby (madness!) or using the link cable (more realistic).
Have Fun,
Gacel