I think it's in the same repository as xMoto, but I can't quite remember -- the particular repo gave installs to a bunch of games.

Try this... Install from here:

http://downloads.maemo.org/product/xmoto

...and see if it gives you the correct repo (although, I never could get xMoto to work!).

I'll try to remember if this is what I did or not.

-T.