Time to add an Enemy to the level.

Create a new scene with a CharacterBody2D as the root.

Rename the scene to Mushroom

Add an AnimatedSprite2D as a child and import the animations for

the death, 

idle and 

run animations.

Add a CollisionShape2D and choose the CapsuleShape2D

Fit it around the centre of the mushroom.

We are not enclosing the mushroom because we are going to have more collision shapes on different parts of the mushroom

top = destroy the mushroom by stomping

sides = hurt the player

Our basic scene tree for the mushroom is: