What is "raycatcher"

Raycatcher is a music video game that is distributed via Valve's Steam service. Gameplay in Raycatcher is determined by music that the player inputs in MP3 format. An in-game algorithm determines level-structure by synchronizing with the music. The objective of the game is to rotate various clustered shapes to match beams of light that form the target pattern. Correctly matched patterns will allow the clusters of shapes to grow and the cluster will evolve. This is the fundamental basis of the game.