How do I make a game with player moving from top to bottom?

Hi peeps and dolls. I kinda needed your help. I was looking forward in building a game, and endless runner with a parachutist. But I wanted to know how would I make the player fly from top to bottom? The endless runner project allows to move horizontally. I would be really pleased if someone helps me out with this one. Tia.

Can he just be falling the whole time? You could slow down his gravity and control him as he falls.