add debug control

scenes/debug_ui/debug_ui.gd

@@ -0,0 +1,13 @@
+extends Control
+
+@export var show_debug_ui: bool = true
+
+func _input(event: InputEvent) -> void:
+	if event.is_action_pressed("show_debug_ui"):
+		show_debug_ui = !show_debug_ui
+
+func _process(delta: float) -> void:
+	if show_debug_ui:
+		DebugDraw2D.set_text("Frames drawn", Engine.get_frames_drawn())
+		DebugDraw2D.set_text("FPS", Engine.get_frames_per_second())
+		DebugDraw2D.set_text("delta", delta)

scenes/debug_ui/debug_ui.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=2 format=3 uid="uid://clcnavxmm7eae"]
+
+[ext_resource type="Script" path="res://scenes/debug_ui/debug_ui.gd" id="1_24u3s"]
+
+[node name="DebugUi" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_24u3s")