The engine supports this. (We used to call portals between worlds Portals, and portals within a world Warps. But I think the designers have been rethinking this.) However, the general idea of the portals is to move between worlds and to allow people to build cool structures and environments.
Boundless is a physical sandbox, this means that blocks have variable friction and bounciness. New blocks in the pipeline also implement more physical actions (vertical, horizontal, and diagonal impulses, and conveyor belt like behaviour.)