Suggestions

Not a big thing but the generic front/middle/back spots to put stickers on is too simple/boring. It'd be cool to be able to position stickers any way you want and as many as you want all over your board. That way you could (theoretically) use all the stickers you earn. Maybe even have a custom sticker creator. 

More modes would be fun, especially in parties, like "horse", graffiti, score attack, etc.