A warning to all those trying to upgrade their Snow Wars Trophy, (as I have been trying to do), never try to start a new game if you have less than the minumum required amount (100np), as an odd glitch occurs, as when the,
"Oops! - It looks like you cannot afford to play this game. Please come back later!"
message appears, you will for some odd reason be set back to the origional Opponent, (The Scarf), and you will have to go back through all the levels to get back to where you were origionally, which can be real pain if you were on the higher levels (#6 and above)
Hopefully this will be fixed soon enough, though in the meantime make sure you take you keep a decent amount of np on hand when playing Snow Wars, as the 100np price can soon deplete your cash on hand if you're not careful...