diff --git a/src/render/input.rs b/src/core/input.rs
similarity index 100%
rename from src/render/input.rs
rename to src/core/input.rs
diff --git a/src/core/mod.rs b/src/core/mod.rs
new file mode 100644
index 0000000..ddaf320
--- /dev/null
+++ b/src/core/mod.rs
@@ -0,0 +1,4 @@
+pub mod input;
+pub mod render;
+pub mod scene;
+pub mod timer;
diff --git a/src/render/app.rs b/src/core/render/app.rs
similarity index 95%
rename from src/render/app.rs
rename to src/core/render/app.rs
index ee88731..9553a5a 100644
--- a/src/render/app.rs
+++ b/src/core/render/app.rs
@@ -1,6 +1,9 @@
 use std::collections::HashMap;
 
-use crate::render::scene::Scene;
+use crate::core::input::InputState;
+use crate::core::scene::SceneManager;
+use crate::core::timer::Timer;
+use crate::game::main_scene::MainScene;
 use egui_winit_vulkano::{Gui, GuiConfig, egui};
 use vulkano::command_buffer::{
     AutoCommandBufferBuilder, CommandBufferUsage, RenderingAttachmentInfo, RenderingInfo,
@@ -16,16 +19,16 @@ use winit::event::{ElementState, WindowEvent};
 use winit::event_loop::ActiveEventLoop;
 use winit::window::WindowId;
 
-use super::input::InputState;
 use super::vulkan_context::VulkanContext;
 
 pub struct App {
     vulkan_context: VulkanContext,
     vulkano_windows: VulkanoWindows,
     gui: HashMap<WindowId, Gui>,
-    scene: Option<Scene>,
     clear_color: [f32; 3],
     input_state: InputState,
+    scene_manager: SceneManager,
+    timer: Timer,
 }
 
 impl From<VulkanoContext> for App {
@@ -34,9 +37,10 @@ impl From<VulkanoContext> for App {
             vulkan_context: VulkanContext::new(vulkano_context),
             vulkano_windows: VulkanoWindows::default(),
             gui: HashMap::new(),
-            scene: None,
             clear_color: [0.0, 0.0, 0.0],
             input_state: InputState::default(),
+            scene_manager: SceneManager::new(),
+            timer: Timer::new(),
         }
     }
 }
@@ -71,13 +75,8 @@ impl ApplicationHandler for App {
         };
         self.gui.insert(window_id, gui);
 
-        self.scene = Some(
-            Scene::load(
-                &self.vulkan_context,
-                self.vulkano_windows.get_primary_renderer_mut().unwrap(),
-            )
-            .unwrap(),
-        );
+        self.scene_manager
+            .load_scene(Box::new(MainScene::default()));
     }
 
     fn window_event(&mut self, event_loop: &ActiveEventLoop, id: WindowId, event: WindowEvent) {
diff --git a/src/render/mod.rs b/src/core/render/mod.rs
similarity index 70%
rename from src/render/mod.rs
rename to src/core/render/mod.rs
index 164a07e..d98c419 100644
--- a/src/render/mod.rs
+++ b/src/core/render/mod.rs
@@ -1,6 +1,4 @@
 pub mod app;
-pub mod input;
 pub mod pipelines;
-pub mod scene;
 pub mod vertex;
 pub mod vulkan_context;
diff --git a/src/render/pipelines/mod.rs b/src/core/render/pipelines/mod.rs
similarity index 100%
rename from src/render/pipelines/mod.rs
rename to src/core/render/pipelines/mod.rs
diff --git a/src/render/pipelines/triangle_pipeline.rs b/src/core/render/pipelines/triangle_pipeline.rs
similarity index 98%
rename from src/render/pipelines/triangle_pipeline.rs
rename to src/core/render/pipelines/triangle_pipeline.rs
index 9fb3629..62bd8b0 100644
--- a/src/render/pipelines/triangle_pipeline.rs
+++ b/src/core/render/pipelines/triangle_pipeline.rs
@@ -20,7 +20,7 @@ use vulkano::pipeline::{
 };
 use vulkano::shader::{EntryPoint, ShaderStages};
 
-use crate::render::vertex::Vertex2D;
+use crate::core::render::vertex::Vertex2D;
 
 pub mod shaders {
     pub mod vs {
diff --git a/src/render/vertex.rs b/src/core/render/vertex.rs
similarity index 100%
rename from src/render/vertex.rs
rename to src/core/render/vertex.rs
diff --git a/src/render/vulkan_context.rs b/src/core/render/vulkan_context.rs
similarity index 100%
rename from src/render/vulkan_context.rs
rename to src/core/render/vulkan_context.rs
diff --git a/src/core/scene.rs b/src/core/scene.rs
new file mode 100644
index 0000000..2286820
--- /dev/null
+++ b/src/core/scene.rs
@@ -0,0 +1,29 @@
+use vulkano_util::renderer::VulkanoWindowRenderer;
+
+use super::{input::InputState, render::vulkan_context::VulkanContext, timer::Timer};
+
+pub trait Scene {
+    fn load(&mut self, app: &mut App);
+    fn update(&mut self, app: &mut App);
+    fn render(&self);
+    fn unload(&mut self);
+}
+
+pub struct SceneManager {
+    current_scene: Option<Box<dyn Scene>>,
+}
+
+impl SceneManager {
+    pub fn new() -> Self {
+        Self {
+            current_scene: None,
+        }
+    }
+
+    pub fn load_scene(&mut self, scene: Box<dyn Scene>) {
+        if let Some(current_scene) = self.current_scene.as_mut() {
+            current_scene.unload();
+        }
+        self.current_scene = Some(scene);
+    }
+}
diff --git a/src/core/timer.rs b/src/core/timer.rs
new file mode 100644
index 0000000..eacf423
--- /dev/null
+++ b/src/core/timer.rs
@@ -0,0 +1,30 @@
+pub struct Timer {
+    start_time: std::time::Instant,
+    last_time: std::time::Instant,
+    current_time: std::time::Instant,
+    delta_time: f32,
+}
+
+impl Timer {
+    pub fn new() -> Self {
+        Self {
+            start_time: std::time::Instant::now(),
+            last_time: std::time::Instant::now(),
+            current_time: std::time::Instant::now(),
+            delta_time: 0.0,
+        }
+    }
+
+    pub fn update(&mut self) {
+        self.current_time = std::time::Instant::now();
+        self.delta_time = self
+            .current_time
+            .duration_since(self.last_time)
+            .as_secs_f32();
+        self.last_time = self.current_time;
+    }
+
+    pub fn get_delta_time(&self) -> f32 {
+        self.delta_time
+    }
+}
diff --git a/src/render/scene.rs b/src/game/main_scene.rs
similarity index 86%
rename from src/render/scene.rs
rename to src/game/main_scene.rs
index 36ba182..4135c38 100644
--- a/src/render/scene.rs
+++ b/src/game/main_scene.rs
@@ -1,3 +1,4 @@
+use crate::core::scene::Scene;
 use crate::render::pipelines::triangle_pipeline::shaders::vs;
 use glam::{Mat3, Mat4, Vec3};
 use std::error::Error;
@@ -70,14 +71,50 @@ const VERTICES: [Vertex2D; 12] = [
     },
 ];
 
-pub struct Scene {
+pub struct MainSceneState {
     pipeline: Arc<GraphicsPipeline>,
     vertex_buffer: Subbuffer<[Vertex2D]>,
 
     rotation_start: Instant,
 }
 
-impl Scene {
+#[derive(Default)]
+pub struct MainScene {
+    state: Option<MainSceneState>,
+}
+
+impl Scene for MainScene {
+    fn load(&mut self, app: &mut App) {
+        let pipeline = create_triangle_pipeline(
+            app.vulkan_context.vulkano_context().device(),
+            app.vulkano_windows.swapchain_format(),
+        )?;
+        let vertex_buffer = Vertex2D::create_buffer(
+            Vec::from_iter(VERTICES),
+            vulkano_context.vulkano_context().memory_allocator(),
+        )?;
+
+        self.state = Some(MainSceneState {
+            pipeline,
+            vertex_buffer,
+            rotation_start: Instant::now(),
+        })
+    }
+
+    fn update(&mut self, app: &mut App) {
+        todo!()
+    }
+
+    fn render(&self) {
+        todo!()
+    }
+
+    fn unload(&mut self) {
+        todo!()
+    }
+}
+
+impl MainScene {
     pub fn load(
         vulkano_context: &VulkanContext,
         vulkano_window_renderer: &VulkanoWindowRenderer,
diff --git a/src/game/mod.rs b/src/game/mod.rs
new file mode 100644
index 0000000..53eb070
--- /dev/null
+++ b/src/game/mod.rs
@@ -0,0 +1 @@
+pub mod main_scene;
diff --git a/src/main.rs b/src/main.rs
index 4ef9dfb..52ba1f6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,9 @@ use vulkano::device::{DeviceExtensions, DeviceFeatures};
 use vulkano_util::context::{VulkanoConfig, VulkanoContext};
 use winit::event_loop::{ControlFlow, EventLoop};
 
-mod render;
+mod core;
+mod game;
+
 fn main() {
     env_logger::init();
 
@@ -28,7 +30,7 @@ fn main() {
     let event_loop = EventLoop::new().unwrap();
     event_loop.set_control_flow(ControlFlow::Poll);
 
-    let mut app = render::app::App::from(vulkano_context);
+    let mut app = core::render::app::App::from(vulkano_context);
 
     match event_loop.run_app(&mut app) {
         Ok(_) => {}