Portal 2 will continue to challenge the player by solving puzzles in test chambers within the Aperture Science Enrichment Center using the "portal gun" (the Aperture Science Handheld Portal Device), a device that can create two portals connecting two surfaces across space. Players solve puzzles by using these portals to move unconventionally between rooms or to use the ability to "fling" objects or themselves across a distance. The functionality of the gun has not changed between the games, but within Portal 2, players can take advantage of the "bleeding" of other physical effects through the portals.