why not set up a system of free challenges without credits, which would take for example 2 or 3 free games at once like the challenges, with maybe less important winnings.. . the challenge games are more varied than the challenges or we can only choose between hippo bool and bubble monkey! at least it would spice up the game to know that we will face a madwinnian opponent. for the wins we can imagine winning 15% of the opponent's current points! ( as for sponsorships). Well, I think I'm getting excited! But think about it! What do you think?