You will unlock this upon completing the first level.
In this game: you must touch orbs that appear around the level that will trigger more platforms to develop in the environment around you. Upon touching the last orb, a shower of geometry will appear somewhere on the map that, when touched, will transport you to the next level. You can use LB to sprint in the game which can give you more distance on your jumps! I used the guide below to beat this level (and get all the collectibles).
LAPIS starts at 1:30