refactor: use compatibility backend for 2d project, ensure students get no warnings on import

Author: NathanLovato

2d-project-completed/gun.gd

@@ -1,7 +1,7 @@
 extends Area2D
 
 
-func _process(delta):
+func _process(_delta):
 	var enemies_in_range = get_overlapping_bodies()
 	if enemies_in_range.size() > 0:
 		var target_enemy = enemies_in_range.front()

2d-project-completed/mob.gd

@@ -13,7 +13,7 @@ func _ready():
 	%Slime.play_walk()
 
 
-func _physics_process(delta):
+func _physics_process(_delta):
 	var direction = global_position.direction_to(player.global_position)
 	velocity = direction * speed
 	move_and_slide()

2d-project-completed/project.godot

@@ -76,7 +76,7 @@ Settings/Show_Tooltips=true
 
 config/name="Your First 2D Game With Godot 4 (GDQuest)"
 run/main_scene="res://survivors_game.tscn"
-config/features=PackedStringArray("4.1", "Forward Plus")
+config/features=PackedStringArray("4.2", "Forward Plus")
 config/icon="res://icon.png"
 
 [display]
@@ -119,3 +119,7 @@ move_down={
 [layer_names]
 
 3d_physics/layer_2="player"
+
+[rendering]
+
+renderer/rendering_method="gl_compatibility"

starter-files/2d-project/project.godot

@@ -75,7 +75,7 @@ Settings/Show_Tooltips=true
 [application]
 
 config/name="Your First 2D Game With Godot 4: START (GDQuest)"
-config/features=PackedStringArray("4.1", "Forward Plus")
+config/features=PackedStringArray("4.2", "Forward Plus")
 config/icon="res://icon.png"
 
 [display]
@@ -118,3 +118,7 @@ move_down={
 [layer_names]
 
 3d_physics/layer_2="player"
+
+[rendering]
+
+renderer/rendering_method="gl_compatibility"