The first stage of the game requires the player to build a path from a crystal to a special square located somewhere in the brain. Various types of platforms rest between the player's starting point and the destination —each type corresponds to one of the avatars. For example, water can only be connected by the nymph, towers by the wizard, and so on. The destination point is often surrounded by "tubes" which often block the players path as a path cannot be created on a square with a tube. Floating enemies assail the player, who can destroy them with a lightning bolt. However, the player must remain stationary while attacking enemies. The density of enemies increases as the player approaches the destination. Once the destination point is reached the surrounding tubes lower, allowing the player to venture into the next stage. Stages vary depending on which tube is chosen.