"W" and "UP Arrow" or Touch Controls.
Are the people who love pizza and don't want to share it, here? Try to grab the various pizzas which come to your table in an order before your friend in slices. You should hold the slices right in the middle to grab them. The one who grabs 5 slices on each pizza, wins the game. You can give this struggle against a friend or a PC. Let the struggle begin.