Pig game

Stack used

GAME RULES:
The game has 2 players, playing in rounds
In each turn, a player rolls a dice as many times as he whishes. Each result get added to his ROUND score
BUT, if the player rolls a 1, all his ROUND score gets lost. After that, it's the next player's turn.
The player can choose to 'Hold', which means that his ROUND score gets added to his GLOBAL score. After that, it's the next player's turn.
The first player to reach 100 points on GLOBAL score wins the game.
You can also specify your own winning score, if not set, 100 will be set by default.