what does the [b][color=blue]blue[/color][/b] lines represent?
Is it the straight line joining the projected shadow of the projectile on the surface of the sphere to the point of collision on the rotating sphere?

what does the [b][color=black]black[/color][/b] lines represent?
Is it the trajectory of the projectile to the point of collision on the rotating sphere?

Is there a YouTube to understand this Coriolis effect in the context of the applet, which is about the Earth or a rotating ball?