As your query mentions a .rar file, it likely refers to a compressed version of the game's executable and assets used for distribution outside of official storefronts.
A simulation of how the Sun and Moon allegedly orbit above the "terran plane" to create light and dark cycles. Flat-Earth-Simulator.rar
Interactive waypoints that allow users to "ascend" through different atmospheric layers as described in flat-earth literature. Satirical and Educational Intent As your query mentions a
A representation of the massive ice barrier that proponents claim surrounds the edge of the world. Flat-Earth-Simulator.rar