Installed SmartCamera2D plugin.

Scenes/Main/camera_controller.gd

@@ -0,0 +1,17 @@
+extends Node2D
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	if Input.is_action_pressed("MoveUp"):
+		global_position += Vector2.UP * 2
+	if Input.is_action_pressed("MoveDown"):
+		global_position += Vector2.DOWN * 2
+	if Input.is_action_pressed("MoveLeft"):
+		global_position += Vector2.LEFT * 2
+	if Input.is_action_pressed("MoveRight"):
+		global_position += Vector2.RIGHT * 2