The game was designed that way I guess. You may not realise this but XMoto was a port of a PC game to the N800 and was never meant to run on the N900. It was just a fluke that it ran on maemo5.

For the most part, XMoto is still the same game as the original release in 2007(?). The only changes that have been made was to enlarge the buttons in the main menu by Divan (famed for the WebOS game manager).

If you are having problems, can you clarify what is happening?