diff --git a/src/core/Game.ts b/src/core/Game.ts
new file mode 100644
index 0000000..4e26196
--- /dev/null
+++ b/src/core/Game.ts
@@ -0,0 +1,144 @@
+import {
+  autoDetectRenderer,
+  Container,
+  Renderer,
+  Ticker,
+} from "pixi.js";
+import { Orientation } from "@/enums/Orientation";
+import { initDevtools } from "@pixi/devtools";
+import { logger } from "./Logger";
+
+class Game {
+  private static instance: Game;
+  private _stage: Container;
+  private _renderer: Renderer;
+  private _ticker: Ticker;
+  private orientation: Orientation = Orientation.Portrait;
+
+  public designWidth: number = 750;
+
+  public info = {
+    width: 0,
+    height: 0,
+  };
+
+  private constructor() {}
+
+  static getInstance(): Game {
+    if (!Game.instance) {
+      Game.instance = new Game();
+    }
+    return Game.instance;
+  }
+
+  public get renderer(): Renderer {
+    return this._renderer;
+  }
+
+  public get stage(): Container {
+    return this._stage;
+  }
+
+  public get ticker(): Ticker {
+    return this._ticker;
+  }
+
+  async init(): Promise<void> {
+    const screenWidth = document.documentElement.clientWidth;
+    const screenHeight = document.documentElement.clientHeight;
+
+    this._stage = new Container();
+    this._stage.label = "root";
+
+    this._renderer = await autoDetectRenderer({
+      autoDensity: true,
+      width: screenWidth,
+      height: screenHeight,
+      antialias: true,
+      backgroundAlpha: 255,
+      resolution: 2,
+      backgroundColor: 0x1d9ce0,
+    });
+
+    this.renderer.resize(screenWidth, screenHeight);
+    document.body.appendChild(this.renderer.canvas);
+
+    window.addEventListener("resize", () => {
+      this.updateView();
+    });
+
+    this._ticker = Ticker.shared;
+    this._ticker.autoStart = true;
+
+    if (import.meta.env.DEV) {
+      initDevtools({ stage: this._stage, renderer: this._renderer });
+    }
+
+    this.updateView();
+    logger.info("Game initialized", { screenWidth, screenHeight });
+  }
+
+  getInfo(): { width: number; height: number } {
+    return { ...this.info };
+  }
+
+  setOrientation(orientation: Orientation): void {
+    this.orientation = orientation;
+    this.updateView();
+  }
+
+  private detectCurrentOrientation(): Orientation {
+    const isLandscape = window.innerWidth > window.innerHeight;
+    return isLandscape ? Orientation.Landscape : Orientation.Portrait;
+  }
+
+  updateView(): void {
+    const clientWidth = document.documentElement.clientWidth;
+    const clientHeight = document.documentElement.clientHeight;
+
+    this.renderer.resize(clientWidth, clientHeight);
+
+    const currentOrientation = this.detectCurrentOrientation();
+
+    let offsetWidth = clientWidth;
+    let offsetHeight = clientHeight;
+
+    if (this.orientation === Orientation.Landscape) {
+      if (currentOrientation === Orientation.Landscape) {
+        this._stage.rotation = 0;
+        this._stage.y = 0;
+      } else {
+        this._stage.rotation = -Math.PI / 2;
+        this._stage.y = clientHeight;
+      }
+      const scaleRatio = clientWidth / this.designWidth;
+      this._stage.scale.set(scaleRatio, scaleRatio);
+      this.info.width = offsetWidth / scaleRatio;
+      this.info.height = offsetHeight / scaleRatio;
+    } else {
+      if (currentOrientation === Orientation.Landscape) {
+        this._stage.rotation = 0;
+        this._stage.y = 0;
+        const scaleRatio = offsetWidth / this.designWidth;
+        this._stage.scale.set(scaleRatio, scaleRatio);
+        this.info.width = offsetHeight / scaleRatio;
+        this.info.height = offsetWidth / scaleRatio;
+      } else {
+        this._stage.rotation = -Math.PI / 2;
+        this._stage.y = offsetHeight;
+        const scaleRatio = offsetWidth / this.designWidth;
+        this._stage.scale.set(scaleRatio, scaleRatio);
+        this.info.width = offsetHeight / scaleRatio;
+        this.info.height = offsetWidth / scaleRatio;
+      }
+    }
+
+    this.render();
+  }
+
+  render(): void {
+    this.renderer.render(this.stage);
+  }
+}
+
+export default Game;
\ No newline at end of file