This is called as Pig Game and as all games it also has set of rules
1. You need to roll dice and ur score will be added to ur total score till the dice rolls to 1 total score will be reset to 0 and then Player 2's turn will be there.
2. You can hold if u want to, after any number of turns.
3. You need to enter the score (which user has liberty to decide) if not set by defaut its set to 50.
This will be a fun Game give it a try !!