1. A system for creating and operating virtual worlds comprising: an Internet-connected server; and software executing on the Internet-connected server from a non-transitory physical medium, the software providing: access to users to tools enabling the users to create new three-dimensional virtual worlds, including terrain and objects in the new virtual worlds, and to configure physics simulation of objects in the new virtual world; administrative control over the new virtual worlds to the creators of those virtual worlds including limiting access by players to the new virtual worlds; and a secure interface for matching players to at least one of the newly-created virtual worlds and granting access according to policies made by the creators of the new virtual worlds; wherein the matching includes at least considering data in a profile created by the one of the players, the data stored and maintained at a third-party non-gaming social media site remote from the Internet-connected server, and matching an interest derived from the data with at least one new virtual world; wherein certain physical characteristics associated with the one or more sets of geographic location data are physically simulated in the newly-created virtual world pursuant to the represented geographic location; and wherein the physical characteristics include season, time, and fauna state associated with season and time.