The game challenges players to grow their neuron as long as possible; climbing through brain tissue, out-competing rival neurons and creating as many connections to distant regions of the brain as they can.
This involves clicking on nodes in an effort to climb higher and higher. A speedy mouse finger is essential as a rapidly shrinking sphere marks the areas that are accessible and once no unclaimed nodes are within it, it’s gameover. Brain freeze. Play it here and read more (silly) below and (clever) here.