Added Level singleton to manage the (un)loading of levels and entrypoints

core/globals/levels.gd

@@ -0,0 +1,57 @@
+extends Node
+
+class Entrypoint extends Object:
+	var scene_name: String
+	var player_position: Vector2
+	var reset_physics: bool
+	func _init(
+		scene_name_: String,
+		player_position_: Vector2,
+		reset_physics: bool
+	) -> void:
+		self.scene_name = scene_name_
+		self.player_position = player_position_
+		self.reset_physics = reset_physics
+
+const SCENES = {
+	"intro": "uid://c6w7lrydi43ts"
+}
+
+var ENTRYPOINTS = {
+	"intro_start": Entrypoint.new("intro", Vector2(0, 0), true)
+}
+
+# load that stuff
+
+var level_root: Node
+var player: Node2D
+
+func load_scene(scn_name: String) -> bool:  # returns true on success
+	if level_root == null:
+		push_error("Can't load level, level_root is not registered yet.")
+		return false
+	if not scn_name in SCENES:
+		push_error("Level " + scn_name + " doesn't exist.")
+		return false
+	unload_scene()
+	var scn = load(SCENES[scn_name])
+	level_root.add_child(scn.instantiate())
+	return true
+
+func unload_scene():
+	for c in level_root.get_children():
+		c.queue_free()
+
+func load_entrypoint(ep_name: String) -> bool: # returns true on success
+	if not ep_name in ENTRYPOINTS:
+		push_error("Entrypoint " + ep_name + " doesn't exist.")
+		return false
+	if player == null:
+		push_error("Can't load entrypoint, player is not registered yet.")
+		return false
+	var e: Entrypoint = ENTRYPOINTS[ep_name]
+	if load_scene(e.scene_name):
+		player.position = e.player_position
+		return true
+	else:
+		return false

levels/intro.tscn

@@ -0,0 +1,3 @@
+[gd_scene format=3 uid="uid://c6w7lrydi43ts"]
+
+[node name="Intro" type="Node2D"]

levels/waking_up.tscn

@@ -1,19 +0,0 @@
-[gd_scene load_steps=3 format=3 uid="uid://ptqto8ctsp4u"]
-
-[ext_resource type="PackedScene" uid="uid://ebb4pfxklatj" path="res://player/player.tscn" id="1_h1tob"]
-[ext_resource type="PackedScene" uid="uid://cbynoofsjcl45" path="res://core/dynamic_polygon.tscn" id="2_83sm2"]
-
-[node name="WakingUp" type="Node2D"]
-
-[node name="Player" parent="." instance=ExtResource("1_h1tob")]
-position = Vector2(400, 224)
-
-[node name="StaticBody2D" type="StaticBody2D" parent="."]
-
-[node name="DynamicPolygon" parent="StaticBody2D" instance=ExtResource("2_83sm2")]
-polygon = PackedVector2Array(296, 288, 296, 368, 536, 368, 536, 336, 776, 336, 776, 400, 104, 400, 104, 360, 184, 360, 184, 304, 248, 304, 248, 288)
-color = Color(0.235294, 0.607843, 0.643137, 1)
-
-[node name="DynamicPolygon2" parent="StaticBody2D" instance=ExtResource("2_83sm2")]
-polygon = PackedVector2Array(520, 96, 520, 280, 552, 280, 552, 32, 632, 32, 632, -8, 520, -8)
-color = Color(0.236278, 0.606088, 0.644729, 1)

main.gd

@@ -0,0 +1,6 @@
+extends Node2D
+
+func _ready() -> void:
+	Levels.level_root = $LevelRoot
+	Levels.player = $Player
+	Levels.load_entrypoint("intro_start")

main.tscn

@@ -1,9 +1,10 @@
-[gd_scene load_steps=7 format=3 uid="uid://c13h0uf5fgx60"]
+[gd_scene load_steps=8 format=3 uid="uid://c13h0uf5fgx60"]
 
-[ext_resource type="PackedScene" uid="uid://ptqto8ctsp4u" path="res://levels/waking_up.tscn" id="1_3swad"]
+[ext_resource type="Script" path="res://main.gd" id="1_m407c"]
 [ext_resource type="Shader" path="res://core/shaders/screen_effects.gdshader" id="2_ha2mu"]
 [ext_resource type="Shader" path="res://core/shaders/screen_effects_2.gdshader" id="3_lm730"]
 [ext_resource type="Texture2D" uid="uid://bwlgypt4xjocj" path="res://core/shaders/vignette_mask.tres" id="4_wc582"]
+[ext_resource type="PackedScene" uid="uid://ebb4pfxklatj" path="res://player/player.tscn" id="5_0agpg"]
 
 [sub_resource type="ShaderMaterial" id="ShaderMaterial_myg35"]
 shader = ExtResource("2_ha2mu")
@@ -13,8 +14,9 @@ shader = ExtResource("3_lm730")
 shader_parameter/vignette_mask = ExtResource("4_wc582")
 
 [node name="Main" type="Node2D"]
+script = ExtResource("1_m407c")
 
-[node name="WakingUp" parent="." instance=ExtResource("1_3swad")]
+[node name="LevelRoot" type="Node2D" parent="."]
 
 [node name="ScreenShader" type="Node2D" parent="."]
 
@@ -41,3 +43,5 @@ anchor_right = 1.0
 anchor_bottom = 1.0
 grow_horizontal = 2
 grow_vertical = 2
+
+[node name="Player" parent="." instance=ExtResource("5_0agpg")]

player/player.gd

@@ -34,3 +34,6 @@ func _physics_process(delta: float) -> void:
 			velocity.y = jump_velocity
 			jumps += 1
 	move_and_slide()
+
+func reset_physics():
+	velocity = Vector2.ZERO

project.godot

@@ -16,6 +16,10 @@ config/features=PackedStringArray("4.3", "Forward Plus")
 boot_splash/bg_color=Color(0, 0, 0, 1)
 config/icon="res://icon.svg"
 
+[autoload]
+
+Levels="*res://core/globals/levels.gd"
+
 [debug]
 
 settings/stdout/print_fps=true