pretty simple concept but has potential for competitive players. I think the slider speed is quite alright. What i do find missing is the ability to see the number i stopped on. I also think there should be a time limit AFTER one of the players presses his button. for example if player1 presses first then player2 has 2 seconds to press or he loses. the added pressure should make it more interesting. I also feel like you have to press go too many times. i think it should only be pressed to start the round and not to show the score.