Maybe make it a full deck of cards ?
Then you could either guess red or black (1/2) , the suit (1/4) , the type (1/13) or the specific card (1/52)
Then you could either guess red or black (1/2) , the suit (1/4) , the type (1/13) or the specific card (1/52)
for now the player can select only one option, black or red. The game has been designed to be very simple. But we like your proposal. maybe We add the feature to the game where the player can select symbols ♣ ♦ ♥ ♠ then player multiply its bet x4 ( in the future)
PD: Sorry for my poor English
it's a shame that the bonus you give us can only be cashed out when you reach 0.01 BTC 
