this game was pretty bad.. it was a good attempt but they should have waited to release it for about a month or five to smooth out the edges of the landscape that seems to have an effect that you are going to fall into the center of the world..
I almost bought this while waiting for my Super Pass to get here so I can have something to do in the mean time. Im glad I didn't now! Instead I bought 007 Rogue agent and I am regretting that just as much! :'(
Can't find any threads about this particular issue on GBAtemp or the wider intarwebz. Saw one video on YouTube that seemed relevant, but it was some dude with the same issue, no solutions offered in the comments. :/