diff --git a/.changeset/itchy-eggs-explain.md b/.changeset/itchy-eggs-explain.md
new file mode 100644
index 0000000..70c1f10
--- /dev/null
+++ b/.changeset/itchy-eggs-explain.md
@@ -0,0 +1,5 @@
+---
+"@tedengine/ted": minor
+---
+
+Fix get resource return signature missing undefined
diff --git a/packages/ted/src/actor-components/mesh-component.ts b/packages/ted/src/actor-components/mesh-component.ts
index f2c53d5..a3ddc3a 100644
--- a/packages/ted/src/actor-components/mesh-component.ts
+++ b/packages/ted/src/actor-components/mesh-component.ts
@@ -15,7 +15,7 @@ export default class TMeshComponent extends TSceneComponent {
   constructor(
     protected engine: TEngine,
     actor: TActor,
-    bodyOptions?: TPhysicsBodyOptions
+    bodyOptions?: TPhysicsBodyOptions,
   ) {
     super(actor, bodyOptions);
 
@@ -50,7 +50,12 @@ export default class TMeshComponent extends TSceneComponent {
    * @param {TMaterials | string } materials or path
    */
   public async applyMesh(engine: TEngine, path: string) {
-    this.mesh = engine.resources.get<TMesh>(path);
+    const mesh = engine.resources.get<TMesh>(path);
+
+    // @todo handle error if mesh is not found
+    if (mesh) {
+      this.mesh = mesh;
+    }
   }
 
   public async applyMaterial(engine: TEngine, path: string) {
@@ -63,7 +68,7 @@ export default class TMeshComponent extends TSceneComponent {
     normals: number[],
     indexes: number[],
     colors: number[],
-    paletteIndex: TPaletteIndex
+    paletteIndex: TPaletteIndex,
   ) {
     const mesh = new TMesh();
 
@@ -74,7 +79,7 @@ export default class TMeshComponent extends TSceneComponent {
       normals,
       indexes,
       colors,
-      paletteIndex
+      paletteIndex,
     );
 
     this.mesh = mesh;
diff --git a/packages/ted/src/actor-components/textured-mesh-component.ts b/packages/ted/src/actor-components/textured-mesh-component.ts
index e03725d..e4de409 100644
--- a/packages/ted/src/actor-components/textured-mesh-component.ts
+++ b/packages/ted/src/actor-components/textured-mesh-component.ts
@@ -48,7 +48,7 @@ export default class TTexturedMeshComponent extends TSceneComponent {
     positions: number[],
     normals: number[],
     indexes: number[],
-    uvs: number[]
+    uvs: number[],
   ) {
     const mesh = new TTexturedMesh();
 
@@ -65,7 +65,12 @@ export default class TTexturedMeshComponent extends TSceneComponent {
    * @param {string} texture path
    */
   public async applyTexture(engine: TEngine, texturePath: string | TTexture) {
-    this.texture = engine.resources.get<TTexture>(texturePath as string);
+    const texture = engine.resources.get<TTexture>(texturePath as string);
+
+    // @todo handle error if texture is not found
+    if (texture) {
+      this.texture = texture;
+    }
   }
 
   public setTexture(texture: TTexture) {
diff --git a/packages/ted/src/actor-components/tilemap-component.ts b/packages/ted/src/actor-components/tilemap-component.ts
index 109d2f0..bafdd19 100644
--- a/packages/ted/src/actor-components/tilemap-component.ts
+++ b/packages/ted/src/actor-components/tilemap-component.ts
@@ -53,13 +53,17 @@ export default class TTilemapComponent extends TSpriteComponent {
    * @param {string} tileset path
    */
   private getTileset(engine: TEngine, tileset: TTilesetConfig): TTileset {
-    let image: TImage;
+    let image: TImage | undefined;
     if (tileset.image instanceof TImage) {
       image = tileset.image as TImage;
     } else {
       image = engine.resources.get<TImage>(tileset.image as string);
     }
 
+    if (!image) {
+      throw new Error(`Tileset image not found: ${tileset.image}`);
+    }
+
     // Get the tileset from the tilemap defs
     const tilesetDef = this.tilemap.tilesetDefs[tileset.id];
 
@@ -80,7 +84,12 @@ export default class TTilemapComponent extends TSpriteComponent {
     if (tilemapPath instanceof TTilemap) {
       this.tilemap = tilemapPath as TTilemap;
     } else {
-      this.tilemap = engine.resources.get<TTilemap>(tilemapPath as string);
+      const tilemap = engine.resources.get<TTilemap>(tilemapPath as string);
+
+      // @todo handle error if tilemap is not found
+      if (tilemap) {
+        this.tilemap = tilemap;
+      }
     }
   }
 
diff --git a/packages/ted/src/core/resource-manager.ts b/packages/ted/src/core/resource-manager.ts
index 5d056e2..6dfd031 100644
--- a/packages/ted/src/core/resource-manager.ts
+++ b/packages/ted/src/core/resource-manager.ts
@@ -9,9 +9,9 @@ export interface IJobAsset {
 }
 
 export default class TResourceManager {
-  private resources: { [key: string]: any } = {};
+  private resources = new Map<string, IAsset | IJobAsset>();
 
-  constructor(private jobs: TJobManager) { }
+  constructor(private jobs: TJobManager) {}
 
   /**
    * Checks if a resource is already loaded into the cache
@@ -19,7 +19,7 @@ export default class TResourceManager {
    * @param key resource key
    */
   public isResourcedLoaded(key: string): boolean {
-    return this.resources[key] !== undefined;
+    return this.resources.has(key);
   }
 
   /**
@@ -27,17 +27,26 @@ export default class TResourceManager {
    *
    * Must be loaded, otherwise undefined will be returned.
    */
-  public get<T extends IAsset | IJobAsset>(key: string): T {
-    return this.resources[key] as T;
+  public get<T extends IAsset | IJobAsset>(key: string): T | undefined {
+    return this.resources.get(key) as T;
   }
 
+  /**
+   * Loads a resource of type T with the specified key.
+   * If the resource is already loaded, it returns the cached resource.
+   * Otherwise, it fetches the resource, caches the loaded resource, and returns it.
+   *
+   * @param type The constructor function of the resource type T.
+   * @param key The key or URL of the resource to load.
+   * @returns A promise that resolves to the loaded resource of type T.
+   */
   public async load<T extends IAsset | IJobAsset>(
-    type: { new(): T },
+    type: { new (): T },
     key: string,
   ): Promise<T> {
     // If already loaded, then just resolve
     if (this.isResourcedLoaded(key)) {
-      return this.resources[key];
+      return this.resources.get(key) as T;
     }
 
     const response = await fetch(key);
@@ -49,7 +58,7 @@ export default class TResourceManager {
       await resource.load(response);
     }
 
-    this.resources[key] = resource;
+    this.resources.set(key, resource);
     return resource;
   }
 }