A parallel dimension exists, at least in virtual space and you will get into it by playing String Theory 2. Once in the black spaces with intersecting lines, you will find a triangular character who wants to get into the portal of the same shape. While he does not succeed, but you, using logic, savvy and various lines, will be able to help him. Red lines can be moved, rotated, moved, and green lines are bent, like rubber ones. Act them as strings, pushing the object away so that it flies through the barrier and is in place. Round portals are intermediate transitions to the main triangular. In parallel, you can listen to an interesting dialogue, in which you will learn a fascinating story.