This is going very well but I have a suggestion:

Could you consider making it so it can combine multiple payments to the same address? This would encourage re-investment and increase deposits and prolong the game (i.e., more fees revenue for the administrator). I know it is possible because SatoshiHype somehow did it (though SatoshiHype vanished with people's money eventually so I prefer BitZuo in all other ways.

(I am still a bit irked about losing my 1st deposit income after I made a second deposit, and it is more complicated to get a multiple non-shared wallets for deposits)