The censored version contains far more endings and new added scenes due to the absence of sexual scenes.
Dating sims (or dating simulations) are a video game subgenre of simulation games, usually Japanese, with romantic elements.
Basically this is a "choose your own adventure" dating style game that will have a different outcome depending on your choices along the way. Move YOUR MOUSE over the picture to see the possible actions. The action you select will determine what happens next. The Star Ocean series of RPGs also feature dating sim elements in a similar manner.