Geometry Dash Y is a custom level created by Knobbelboy and Geomania. It is a Hard Demon with a 10-star difficulty rating. This level is a sequel to Demon X, created by TriAxis. Additionally, Knobbelboy created Y in version 2.0, incorporating numerous decorations from this update.
The level starts with the familiar cube section. Here, the player has to jump over spikes, pillars, and blocks while using orbs. At a certain point, the cube will turn into a robot. Not long after that, the player enters the ship section. This section contains a large number of moving obstacles. The player needs to move skillfully to overcome them. The player will proceed to the next level, the wave stage. In this section, the player may experience confusion due to sudden movements while traversing the tunnel. The player then enters the shadow section, where they can change gravity using invisible blue spheres.
Geometry Dash Y contains three coins that the player should collect.