I was able to use the online feature exactly once. After that race, I was given a boost. Since that time, an animated yellow arrow is pointing to "BOOSTS" and I am unable to select the "RACE NOW" button. I can tap BOOSTS, select an empty boost slot but then get stuck on the boost selector screen. The only other button that is usable is "HELP", which only displays the modal help dialog. Because I can't get RP by racing, I can't upgrade my tricks, so I either play old levels or lose the races I need to upgrade for. I've made as much progress as I can and am now blocked. If I can't advance in the game, there is no sense in playing it.