I need some help about tappy chicken game

Hi,I’m watching Tappy Chicken: BP & Art Discussion | Feature Highlight | Unreal Engine - YouTube at 30:56
I want to know how to make a character move forward after clicked play then clicked tappy to flap then the character will move back a little,How do i make this bluerprint? I’m look at their blueprints but i can’t understand it.Please help me thank you.

Hello paeillici,

You should check start state with boolean and branch.Boolean must be start value is false If boolean false character not moving. If boolean true character moving. And if user tap the screen then boolean set true. That’s all. Below is a very simple example.