diff --git a/misc/2.5d/README.md b/misc/2.5d/README.md
index abad4f37..01b3d95d 100644
--- a/misc/2.5d/README.md
+++ b/misc/2.5d/README.md
@@ -29,3 +29,7 @@ The plugin also adds YSort25D to sort Node25D nodes, and ShadowMath25D for calcu
 ![Cube](screenshots/cube.png)
 
 ![2.5D Editor Viewport](screenshots/editor.png)
+
+## Music License
+
+`assets/mr_mrs_robot.ogg` Copyright © circa 2008 Juan Linietsky, CC-BY: Attribution.
diff --git a/misc/2.5d/assets/demo_scene.tscn b/misc/2.5d/assets/demo_scene.tscn
index 04981477..aed9dbab 100644
--- a/misc/2.5d/assets/demo_scene.tscn
+++ b/misc/2.5d/assets/demo_scene.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=13 format=2]
+[gd_scene load_steps=14 format=2]
 
 [ext_resource path="res://assets/ui/overlay.tscn" type="PackedScene" id=1]
 [ext_resource path="res://assets/player/player_25d.tscn" type="PackedScene" id=2]
@@ -9,6 +9,7 @@
 [ext_resource path="res://assets/platform/platform_sprite.gd" type="Script" id=7]
 [ext_resource path="res://addons/node25d/y_sort_25d.gd" type="Script" id=8]
 [ext_resource path="res://addons/node25d/icons/y_sort_25d_icon.png" type="Texture" id=9]
+[ext_resource path="res://assets/mr_mrs_robot.ogg" type="AudioStream" id=10]
 
 [sub_resource type="BoxShape" id=1]
 extents = Vector3( 5, 0.5, 5 )
@@ -613,3 +614,8 @@ script = ExtResource( 8 )
 __meta__ = {
 "_editor_icon": ExtResource( 9 )
 }
+
+[node name="AudioStreamPlayer" type="AudioStreamPlayer" parent="."]
+stream = ExtResource( 10 )
+volume_db = -20.0
+autoplay = true
diff --git a/misc/2.5d/assets/mr_mrs_robot.ogg b/misc/2.5d/assets/mr_mrs_robot.ogg
new file mode 100644
index 00000000..76c5e8a5
Binary files /dev/null and b/misc/2.5d/assets/mr_mrs_robot.ogg differ
diff --git a/misc/2.5d/assets/mr_mrs_robot.ogg.import b/misc/2.5d/assets/mr_mrs_robot.ogg.import
new file mode 100644
index 00000000..96d6caf4
--- /dev/null
+++ b/misc/2.5d/assets/mr_mrs_robot.ogg.import
@@ -0,0 +1,15 @@
+[remap]
+
+importer="ogg_vorbis"
+type="AudioStreamOGGVorbis"
+path="res://.import/mr_mrs_robot.ogg-04d8a930124c76b878f30fed4f47903c.oggstr"
+
+[deps]
+
+source_file="res://assets/mr_mrs_robot.ogg"
+dest_files=[ "res://.import/mr_mrs_robot.ogg-04d8a930124c76b878f30fed4f47903c.oggstr" ]
+
+[params]
+
+loop=true
+loop_offset=0
diff --git a/misc/2.5d/project.godot b/misc/2.5d/project.godot
index fbd76269..a46f1aef 100644
--- a/misc/2.5d/project.godot
+++ b/misc/2.5d/project.godot
@@ -186,6 +186,10 @@ exit={
  ]
 }
 
+[physics]
+
+3d/physics_engine="Bullet"
+
 [rendering]
 
 quality/driver/driver_name="GLES2"
diff --git a/mono/2.5d/README.md b/mono/2.5d/README.md
index 2a6f6ee7..d190e253 100644
--- a/mono/2.5d/README.md
+++ b/mono/2.5d/README.md
@@ -29,3 +29,7 @@ The plugin also adds YSort25D to sort Node25D nodes, and ShadowMath25D for calcu
 ![Cube](../../misc/2.5d/screenshots/cube.png)
 
 ![2.5D Editor Viewport](../../misc/2.5d/screenshots/editor.png)
+
+## Music License
+
+`assets/mr_mrs_robot.ogg` Copyright © circa 2008 Juan Linietsky, CC-BY: Attribution.
diff --git a/mono/2.5d/assets/demo_scene.tscn b/mono/2.5d/assets/demo_scene.tscn
index 3215a69f..6139049b 100644
--- a/mono/2.5d/assets/demo_scene.tscn
+++ b/mono/2.5d/assets/demo_scene.tscn
@@ -1,6 +1,7 @@
-[gd_scene load_steps=13 format=2]
+[gd_scene load_steps=14 format=2]
 
 [ext_resource path="res://addons/node25d-cs/YSort25D.cs" type="Script" id=1]
+[ext_resource path="res://assets/mr_mrs_robot.ogg" type="AudioStream" id=2]
 [ext_resource path="res://assets/ui/overlay.tscn" type="PackedScene" id=3]
 [ext_resource path="res://assets/player/player_25d.tscn" type="PackedScene" id=4]
 [ext_resource path="res://assets/shadow/shadow_25d.tscn" type="PackedScene" id=5]
@@ -26,6 +27,7 @@ extents = Vector3( 5, 0.5, 5 )
 [node name="Overlay" parent="." instance=ExtResource( 3 )]
 
 [node name="Player25D" parent="." instance=ExtResource( 4 )]
+position = Vector2( 0, -226.274 )
 z_index = -3952
 
 [node name="Shadow25D" parent="." instance=ExtResource( 5 )]
@@ -610,3 +612,8 @@ script = ExtResource( 9 )
 
 [node name="YSort25D" type="Node" parent="."]
 script = ExtResource( 1 )
+
+[node name="AudioStreamPlayer" type="AudioStreamPlayer" parent="."]
+stream = ExtResource( 2 )
+volume_db = -20.0
+autoplay = true
diff --git a/mono/2.5d/assets/mr_mrs_robot.ogg b/mono/2.5d/assets/mr_mrs_robot.ogg
new file mode 100644
index 00000000..76c5e8a5
Binary files /dev/null and b/mono/2.5d/assets/mr_mrs_robot.ogg differ
diff --git a/mono/2.5d/assets/mr_mrs_robot.ogg.import b/mono/2.5d/assets/mr_mrs_robot.ogg.import
new file mode 100644
index 00000000..96d6caf4
--- /dev/null
+++ b/mono/2.5d/assets/mr_mrs_robot.ogg.import
@@ -0,0 +1,15 @@
+[remap]
+
+importer="ogg_vorbis"
+type="AudioStreamOGGVorbis"
+path="res://.import/mr_mrs_robot.ogg-04d8a930124c76b878f30fed4f47903c.oggstr"
+
+[deps]
+
+source_file="res://assets/mr_mrs_robot.ogg"
+dest_files=[ "res://.import/mr_mrs_robot.ogg-04d8a930124c76b878f30fed4f47903c.oggstr" ]
+
+[params]
+
+loop=true
+loop_offset=0
diff --git a/mono/2.5d/project.godot b/mono/2.5d/project.godot
index 76763d73..ede12a71 100644
--- a/mono/2.5d/project.godot
+++ b/mono/2.5d/project.godot
@@ -163,6 +163,10 @@ exit={
  ]
 }
 
+[physics]
+
+3d/physics_engine="Bullet"
+
 [rendering]
 
 quality/driver/driver_name="GLES2"