diff --git a/life/src/main.rs b/life/src/main.rs
index 0c97aea..723a6ea 100644
--- a/life/src/main.rs
+++ b/life/src/main.rs
@@ -1,3 +1,4 @@
+use bevy::asset::{AssetPath, HandleTemplate};
 use engine::*;
 
 const TILE: &str = "tileGrey_01.png";
@@ -72,7 +73,6 @@ fn main() {
             Update,
             toggle_state_entities::<AudioPlayback>.run_if(state_changed::<AudioPlayback>),
         )
-        .add_observer(on_add_ui_button)
         .add_observer(on_add_coordinates)
         .run();
 }
@@ -86,7 +86,7 @@ enum AudioPlayback {
     Play,
 }
 
-#[derive(Debug, Component, PartialEq, Default, FromTemplate)]
+#[derive(Debug, Component, PartialEq, Default)]
 #[require(Visibility, Transform)]
 enum UiButton {
     Power,
@@ -117,51 +117,41 @@ impl UiButton {
     }
 }
 
-fn on_add_ui_button(
-    trigger: On<Add, UiButton>,
-    mut commands: Commands,
-    query: Query<&UiButton>,
-    server: Res<AssetServer>,
-) {
-    let button = query.get(trigger.entity).unwrap();
-    commands
-        .entity(trigger.entity)
-        .insert((
-            Button,
-            Hovered::default(),
-            Outline {
-                width: Val::Px(5.0),
-                color: Color::NONE,
-                ..default()
-            },
+fn ui_button(
+    button: UiButton,
+) -> impl Scene {
+    let color: Color = WHITE.with_alpha(0.5).into();
+    bsn! {
+        Button
+        Hovered
+        Outline {
+            width: Val::Px(5.0),
+            color: Color::NONE,
+        }
+        Node {
+            top: Val::Px(2.5),
+            left: Val::Px(2.5),
+            margin: UiRect::all(Val::Px(2.5)),
+        }
+        BackgroundColor(GRAY)
+        ImageNode {
+            image: HandleTemplate::Path(TILE),
+            color,
+        }
+        Children [
             Node {
-                top: Val::Px(2.5),
-                left: Val::Px(2.5),
-                margin: UiRect::all(Val::Px(2.5)),
-                ..default()
-            },
-            BackgroundColor(GRAY.into()),
+                align_self: AlignSelf::Center,
+                justify_self: JustifySelf::Center,
+                width: Val::Percent(100.0),
+                height: Val::Percent(100.0),
+            }
             ImageNode {
-                image: server.load(TILE),
-                color: WHITE.with_alpha(0.5).into(),
-                ..default()
-            },
-            children![(
-                Node {
-                    align_self: AlignSelf::Center,
-                    justify_self: JustifySelf::Center,
-                    width: Val::Percent(100.0),
-                    height: Val::Percent(100.0),
-                    ..default()
-                },
-                ImageNode {
-                    image: server.load(button.icon()),
-                    ..default()
-                },
-            )],
-        ))
-        .observe(responsive_button_over)
-        .observe(responsive_button_out);
+                image: HandleTemplate::Path(AssetPath::parse(button.icon())),
+            }
+        ]
+        on(responsive_button_over)
+        on(responsive_button_out)
+    }
 }
 
 fn the_camera() -> impl Scene {
@@ -180,27 +170,27 @@ fn the_ui() -> impl Scene {
         }
         Transform
         Children [
-            UiButton::Power
+            ui_button(UiButton::Power)
                 on(|_: On<Pointer<Press>>, mut writer: MessageWriter<AppExit>| {
                     writer.write(AppExit::Success);
                 }),
-            UiButton::Pause
+            ui_button(UiButton::Pause)
                 SimulationPlayback::Run
                 on(|_: On<Pointer<Press>>, mut next: ResMut<NextState<SimulationPlayback>>| {
                     // Set simulation state
                     next.set(SimulationPlayback::Pause);
                 }),
-            UiButton::Play
+            ui_button(UiButton::Play)
                 SimulationPlayback::Pause
                 on(|_: On<Pointer<Press>>, mut next: ResMut<NextState<SimulationPlayback>>| {
                     // Set simulation state
                     next.set(SimulationPlayback::Run);
                 }),
-            UiButton::Step
+            ui_button(UiButton::Step)
                 on(|_: On<Pointer<Press>>, mut next: ResMut<NextState<SimulationPlayback>>| {
                     next.set(SimulationPlayback::Step);
                 }),
-            UiButton::ZoomOut
+            ui_button(UiButton::ZoomOut)
                 on(|_: On<Pointer<Press>>, mut projection: Query<&mut Projection>| {
                     projection.iter_mut().for_each(|mut p| match *p {
                         Projection::Orthographic(ref mut o) => {
@@ -209,7 +199,7 @@ fn the_ui() -> impl Scene {
                         _ => todo!(),
                     });
                 }),
-            UiButton::ZoomIn
+            ui_button(UiButton::ZoomIn)
                 on(|_: On<Pointer<Press>>, mut projection: Query<&mut Projection>| {
                     projection.iter_mut().for_each(|mut p| match *p {
                         Projection::Orthographic(ref mut o) => {
@@ -218,15 +208,15 @@ fn the_ui() -> impl Scene {
                         _ => todo!(),
                     });
                 }),
-            UiButton::MuteAudio
+            ui_button(UiButton::MuteAudio)
                 AudioPlayback::Play
                 on(|_: On<Pointer<Press>>, mut next: ResMut<NextState<AudioPlayback>>| {
-                    next.set(AudioPlayback::Play);
+                    next.set(AudioPlayback::Mute);
                 }),
-            UiButton::PlayAudio
+            ui_button(UiButton::PlayAudio)
                 AudioPlayback::Mute
                 on(|_: On<Pointer<Press>>, mut next: ResMut<NextState<AudioPlayback>>| {
-                    next.set(AudioPlayback::Mute);
+                    next.set(AudioPlayback::Play);
                 }),
         ]
     }
@@ -235,7 +225,7 @@ fn the_ui() -> impl Scene {
 #[derive(Default, Debug, Resource)]
 struct NextCoordinates(Coordinates);
 
-#[derive(Debug, Default, Clone, PartialEq, Hash, Eq, Component)]
+#[derive(Debug, Default, Clone, PartialEq, Hash, Eq, Component, FromTemplate)]
 #[require(Visibility, Transform)]
 struct Coordinates {
     x: isize,
@@ -383,7 +373,7 @@ fn grid_gizmo(mut gizmos: Gizmos, coordinates: Res<NextCoordinates>) {
     gizmos.rect_2d(isometry, Vec2::ONE * SCALE, PURPLE)
 }
 
-#[derive(Component, Debug, PartialEq, Hash, Eq)]
+#[derive(Component, Debug, PartialEq, Hash, Eq, FromTemplate)]
 struct Cell;
 
 // When left mouse clicked, spawn a cell at GridPosition
@@ -522,12 +512,19 @@ enum Lifecycle {
     Dead(Entity),
 }
 
+fn new_cell(Coordinates { x, y }: Coordinates) -> impl Scene {
+    bsn! {
+        Coordinates { x, y }
+        Cell
+    }
+}
+
 fn cell_lifecycle(mut reader: MessageReader<Lifecycle>, mut commands: Commands) {
     reader.read().for_each(|msg| match msg {
         Lifecycle::Alive(c) => {
             debug!("creating {:?}", c);
             // TODO: Safeguard: ensure no other cell there?
-            commands.spawn((c.clone(), Cell));
+            commands.spawn_scene(new_cell(c.clone()));
         }
         Lifecycle::Dead(e) => {
             commands.entity(*e).despawn();