Make a new Character class which both the enemy and player share

Characters/Character.gd

@@ -0,0 +1,37 @@
+extends Node2D
+class_name Character
+
+export var base_max_health : int = 20
+export (int, 1, 5) var level : int = 1 setget level_change
+
+var health
+
+
+var map_position : Vector2 = Vector2.ZERO
+onready var target_position : Vector2 = position
+var moving : bool = false
+
+
+func level_change(new_level):
+	# when leveing up restore health
+	health = base_max_health * pow(level, 1.5)
+
+
+func _physics_process(delta):
+	
+	# If the 2 positions are close enough, then not moving
+	moving = false if target_position.round() == position.round() else true
+	
+	if not moving: return
+	
+	#TODO: Replace with tween magic
+	position += (target_position - position)/2.5
+
+func take_damage(damage):
+	health -= damage
+	if health <= 0:
+		die()
+
+func die():
+	#Animation here
+	queue_free()

Characters/Enemy.gd

@@ -1,16 +1 @@
-extends Node2D
+extends Character
-
-export var map_position : Vector2 = Vector2.ZERO
-
-onready var target_position : Vector2 = position
-var moving : bool = false
-
-func _physics_process(delta):
-	
-	# If the 2 positions are close enough, then not moving
-	moving = false if target_position.round() == position.round() else true
-	
-	if not moving: return
-	
-	#TODO: Replace with tween magic
-	position += (target_position - position)/2.5

Characters/Player.gd

@@ -1,16 +1 @@
-extends Node2D
+extends Character
-
-export var map_position : Vector2 = Vector2.ZERO
-
-onready var target_position : Vector2 = position
-var moving : bool = false
-
-func _physics_process(delta):
-	
-	# If the 2 positions are close enough, then not moving
-	moving = false if target_position.round() == position.round() else true
-	
-	if not moving: return
-	
-	#TODO: Replace with tween magic
-	position += (target_position - position)/2.5

project.godot

@@ -13,9 +13,15 @@ _global_script_classes=[ {
 "class": "CardResource",
 "language": "GDScript",
 "path": "res://Assets/CardDB/CardBD.gd"
+}, {
+"base": "Node2D",
+"class": "Character",
+"language": "GDScript",
+"path": "res://Characters/Character.gd"
 } ]
 _global_script_class_icons={
-"CardResource": ""
+"CardResource": "",
+"Character": ""
 }
 
 [application]