Red or Black? is a very very simple game that can either be used as a quick, reward game or to give your students a choice between giving one of two answers.
Have a student come to the board, select the colour they think will come out of the hat and then click on the hat to see if they are right or not.
If you choose to use it as a reward game, give one team points if they get it right and the other team points if they get it wrong.
If you choose to use it to give your students a choice of answers you could, for example, assign red to "I like..." and black to "I don't like..." (or anything similar you choose) and have them just click on the hat and give the appropriate answer.