Play as neuron and grow as long as possible in this fast-paced game. Grow by clicking on orbs within the circle that surrounds your most recently clicked orb. This circle will decrease over time, so click fast! As you grow, you'll encounter competing neurons and special orbs. Purple orbs increase the range of your circle, green orbs will give you a boost upwards, blue orbs freeze your circle and rival neurons for a second, and yellow orbs will give you a huge boost.