The complain I have with this game is that its impossible to unlock the last season without making in-app purchases.I have purchased all cars available in exchange for credits.But its impossible to buy cars which are available through tokens.An option should be made available where we can exchange a token for a few credits.Also,the lack of race kits in the game makes it impossible to fully upgrade the cars and participate online.An option of buying race kits with credits should also be there.