First of all , its surprising that you didn't take time to make your OP more attractive , just know that giving out coins are the not the only way to promote the site .
Second of all , remove the giveaway from your OP , post it in games and round section , you might get in trouble for this .

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Coming to the game , design looks good . Can you tell the probabilities of each ? I still don't understand why some are x32 , x49 so if you gave the probabilities for each it will be helpful .

Also why does it have time lag between games?