Spark is a king-of-the-hill type of game in which players must either remain the last one standing, or be the first to deplete their bar. The game is played with the Makey Makey, where all players stand on a conductive pad which represents a key. Players interact with the game by touching another conductive object on a table. This closes the loop and counts as a button press.
Players can deplete their bar by being the only player pressing the button. If another player is also pressing a button, a circle grows from the middle and will eliminate players as it grows beyond them. Touching another person’s skin while they are touching the button will also count as 2 button presses.