To keep things constantly interesting, the player isn’t restricted to one Sim with the ability to switch to other households and player created characters ensuring there’s almost always something to do. There’s the steady stream of objectives, too, which provide structure to the game as well as earn much needed experience points, which inevitably opens up more possibilities.
Buildings can be purchased as well as items to furnish the surroundings. Most of the regular Sims format is here bar the ability to have children.
Thanks to Ricon Del Simmer for the tip!