This is 2 player freeze tag. The red player, the "It" is tagging out all of the other green players. The red player is controlled by the arrow keys, you tag out the green players by hitting the arrow keys in the direction they're in near you. The Purple player turns the frozen players into regular players again. The Purple player is controlled by the A, S, W, and D keys. Make sure you avoid the red player if you're the purple player, because the red player can tag you out too. The Purple player when tagged the first time will change to a different color. So the purple player will have three lives, after that, when it turns black that's the end.