well real binary uses the same basic code but, in real binary each number has its own code
0 - 00110000
1 - 00110001
2 - 00110010
3 - 00110011
4 - 00110100
5 - 00110101
6 - 00110110
7 - 00110111
8 - 00111000
9 - 00111001
But since it is just a game it doesn;t matter