Add loading when load warcraft scene

scenes/UI/ChooseScene.gd

@@ -1,4 +1,5 @@
 extends Control
 
+# Load scene warcraft
 func _on_WarCraft_pressed():
-	get_tree().change_scene("res://scenes/levels/WarCraft.tscn")
+	Global.goto_scene("res://scenes/levels/WarCraft.tscn")

scenes/UI/ChooseScene.tscn

@@ -6,13 +6,20 @@
 [node name="ChooseScene" type="Control"]
 anchor_right = 1.0
 anchor_bottom = 1.0
-margin_left = 200.0
 script = ExtResource( 1 )
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="GridContainer" type="GridContainer" parent="."]
+[node name="games" type="Control" parent="."]
+margin_left = 200.0
+margin_right = 1024.0
+margin_bottom = 600.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="GridContainer" type="GridContainer" parent="games"]
 margin_left = 25.0
 margin_top = 26.2599
 margin_right = 824.0
@@ -21,10 +28,10 @@ __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="WarCraft" type="TextureButton" parent="GridContainer"]
+[node name="WarCraft" type="TextureButton" parent="games/GridContainer"]
 margin_right = 150.0
 margin_bottom = 150.0
 mouse_default_cursor_shape = 2
 texture_normal = ExtResource( 2 )
 
-[connection signal="pressed" from="GridContainer/WarCraft" to="." method="_on_WarCraft_pressed"]
+[connection signal="pressed" from="games/GridContainer/WarCraft" to="." method="_on_WarCraft_pressed"]

scenes/levels/WarCraft.gd

@@ -1,9 +1,15 @@
 extends Spatial
 
-export (PackedScene) var main = load("res://scenes/main.tscn")
+func _process(_delta):
+	# Event key "escape" and "godot event" ui_end
+	if Input.is_action_just_pressed("ui_end"):
+		_quit_to_menu()
 
 func _notification(what):
-	# Back to main scene
+	# Notification for android back action
 	if what == MainLoop.NOTIFICATION_WM_GO_BACK_REQUEST:
-		var scene = main.instance()
-		call_deferred("add_child", scene)
+		_quit_to_menu()
+
+# Back to main scene
+func _quit_to_menu():
+	Global.goto_scene("res://scenes/main.tscn")

scenes/main.gd

@@ -3,7 +3,7 @@ extends Node
 export (PackedScene) var about = load("res://scenes/UI/About.tscn")
 export (PackedScene) var scenes = load("res://scenes/UI/ChooseScene.tscn")
 
-var scene
+var current_scene = null
 
 # Quit the game
 func _on_Quit_pressed():
@@ -12,17 +12,17 @@ func _on_Quit_pressed():
 # Load scene about
 func _on_About_pressed():
 	_prepare_change_scene()
-	scene = about.instance()
-	add_child(scene)
+	current_scene = about.instance()
+	add_child(current_scene)
 
 # Load scene for select game
 func _on_New_pressed():
 	_prepare_change_scene()
-	scene = scenes.instance()
-	add_child(scene)
+	current_scene = scenes.instance()
+	add_child(current_scene)
 
 ## PRIVATE
 func _prepare_change_scene():
-	if (scene != null):
-		remove_child(scene)
-		scene.call_deferred("free")
+	if (current_scene != null):
+		remove_child(current_scene)
+		current_scene.call_deferred("free")