Click that checkbox with label "full":

The projectile will penetrate the earth, as if all the mass of the earth were concentrated at center of mass.

This options just to show that: the trajectile of the projectile motion is actually part of an ellipse.
Try it!
Please check out  [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=398.0]Projectile Orbits and Satellite orbits[/url]