How can I make my Character rotate in Paper2D

I am brand new to UE4 and I have only watched Epic Game’s Paper2d tutorial series. In my game the player character will be a cube (or square since it is Paper 2D). I want the player to be able to press (right or D) to rotate the cube 90 degrees clockwise and the cube will land on one of its faces, and (A or left ) to rotate -90 degrees counter-clockwise. I know how to set up the inputs, but I could not find out how to rotate my character 90 degrees. Any help would be amazing, and screenshots will be helpful.
Thank You,
-Ravio

I thought of that possibility, but this block will attach to other objects and will still need to tilt. So that will not work I did some brainstorming though and wondered if I could apply physics to my Character and whenever the player presses right the upper right corner of the block will gain a massive amount of weight therefore tilting the block. So I was wondering how to apply physics to the player character if I cannot will I have to create a new pawn that I can add weight to? Thank you for the answer and please reply even if you do not know the answer just tell me you do not please. THANK YOU!

In paper 2d you will need to create a flipbook. Create a series of sprites when played in sequence, makes it appear it is rotating.

Sample 2d animation

How is the player pressing the upper right hand corner - by mouse click or by another actor?

I was wondering if the player pressed right I could spawn a actor in the upper right corner behind the block.