Only the lack of players is a problem, making it near impossible to get a game going online. Ideally, more players will begin popping online so as to make multiplayer a real option for those times when you're fed up with the uneven difficulty of the campaign (which is likely to be often).
Assuming this happens, the only serious flaw pertains to the game's steep difficulty curve. StarPagga is one of the best-looking, tightest tuned aerial shooters on the device, yet the ridiculously hard campaign prevents unfettered enjoyment. Fix this and it could very well be the daddy of handheld space shooters.