Aahh, the excitement of curling. It could be fun if you were able to exert some energy on the stones, it just feels very slow. EDIT: you can only click the "+" six times. Not enough.
BTW, what's the point of a "-" button? Add brushing to steer the stone, and you have a game.
Also, it needs to be scaled to fit into a monitor. I get that you're aiming at portable devices, but still.