What are the wing things? I know they must do something, but Mr. Steven never explains what. I have finished the entire game without using them though, so IDK. 

This game is so awesome, I remember playing the original one back when you just dueled the lady of the lake. It has come so far since then. 

I like how you put easter eggs in, and secret areas, like the graveyard subway station and the surf ability. Also, poor Rob. 

Anyway, does anyone know what these things do?

Ahhh, i found what they do in the devlog: ""+ added pickups that refresh aerial movement (look for a wing icon inside a circle)""

So what it lets you do is dash again, or double jump again, or orca flip again. So if they are stacked then you can quadruple jump or whatever.