Create a new scene

with Node 2D as the root

Rename it to HappyBuddy

Add an AnimationPlayer node as a child

Save the scene as happybuddy.tscn

Add a Sprite2D as a child

Set ground_shadow.png as the texture

Rename the node to GroundShadow

Press Ctrl+L to lock the node

So we don't accidentally move it.

To change the colour of the sprite

Add a new Node2D as a child of Happy

Rename it to Colourizer 

Set the modulate property

To a colour of your choice

We will start assembling our Buddy

part by part starting with the left leg

Add a Sprite2D node as a child of Colourizer 

use square_upper_leg.png as the texture

Rename the node to UpperLegLeft

Add a Sprite2D node as a child of

LowerLegLeft

Use square_foot.png as the texture

Rename the node to FootLeft

Move and rotate it until it fits the leg well.

Finally add a Sprite2D as a child of Body

Rename it to Face

Use square_face.png as the texture

Press Ctrl+L to lock the face so we don't accidentally move it later.

Godot