After reading various posts and thinking about it myself, I've had another thought. Leave it as it is. No stats, no ratings, no nothing. Just play the game and have fun with it. There's just not a way to keep track of things like that that won't actually cause some players to play for the statistics instead of play the game to win. So let's not have any ratings or stats made for this one game. Or, at a minimum, just wins and losses. I think there's not much argument about those two stats. :)
It seems like the game is quite popular as it is without the stats. Work on things that can make the game more fun to play, rather than keeping track of you how people play the game. Like we posted about with giving the creator control over the starting point and bonus amount. I'm sure there's other things that could be thought up that could make interesting to play variants of this game. Like having a minimum bet or a maximum bet. Or letting you know your opponent's bets. Or making your opponent's bets for them, but if they're low, you get dropped! Lots of ways to play this game. Who needs stats?