This is also suggested here: scirra.com/FORUM/topic66035.html
but BasicTribe, you need to wait a bit more, because something bug free need time.
Look the Golden Lotus game, was designed using sines as courses, and the bullet behavior.
So, believe you can make anything without much trouble, doing two objects to simulate a course, and setup behind the parabolic math when you want the object to follow start to bows (Y=aX^2+b)