He did not ask how the game works, but about the provably fair system. There is no ways to verify our bets, isn't it? I cant even see my bets lists/bets history.
I think there is someting fishy on your site, I tried again with my small deposit. Started with balance of 0.00058btc/0.58mbtc, I choose 5 cells @0.01mbtc but it cost me 45k satoshi = 0.45mbtc (my balance down to 0.00013btc/0.13mbtc). While it should be only cost me 0.01mbtc*5 = 0.05mbtc = 5000satoshi. Then I hit x4.8 but I only win 4800satoshi.
Tried it again with 1 cell only and it is working fine it cost me only 0.01mbtc. But I tried it again with 2cells @0.01mbtc and it costs me 0.06mbtc = 6000satoshi. How could I pay 0.06mbtc for 2cells @0.01mbtc stake?