diff --git a/package.json b/package.json
index 4798aa66b2f..ab72d9f0538 100644
--- a/package.json
+++ b/package.json
@@ -54,6 +54,7 @@
     "lefthook": "^2.0.4",
     "msw": "^2.12.3",
     "phaser3spectorjs": "^0.0.8",
+    "type-fest": "^5.3.0",
     "typedoc": "^0.28.14",
     "typedoc-github-theme": "^0.3.1",
     "typedoc-plugin-coverage": "^4.0.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1607bfce611..e8889db4816 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -90,6 +90,9 @@ importers:
       phaser3spectorjs:
         specifier: ^0.0.8
         version: 0.0.8
+      type-fest:
+        specifier: ^5.3.0
+        version: 5.3.0
       typedoc:
         specifier: ^0.28.14
         version: 0.28.14(typescript@5.9.3)
@@ -1779,8 +1782,8 @@ packages:
     resolution: {integrity: sha512-NoZ4roiN7LnbKn9QqE1amc9DJfzvZXxF4xDavcOWt1BPkdx+m+0gJuPM+S0vCe7zTJMYUP0R8pO2XMr+Y8oLIg==}
     engines: {node: '>=6'}
 
-  type-fest@5.2.0:
-    resolution: {integrity: sha512-xxCJm+Bckc6kQBknN7i9fnP/xobQRsRQxR01CztFkp/h++yfVxUUcmMgfR2HttJx/dpWjS9ubVuyspJv24Q9DA==}
+  type-fest@5.3.0:
+    resolution: {integrity: sha512-d9CwU93nN0IA1QL+GSNDdwLAu1Ew5ZjTwupvedwg3WdfoH6pIDvYQ2hV0Uc2nKBLPq7NB5apCx57MLS5qlmO5g==}
     engines: {node: '>=20'}
 
   typedoc-github-theme@0.3.1:
@@ -3288,7 +3291,7 @@ snapshots:
       statuses: 2.0.2
       strict-event-emitter: 0.5.1
       tough-cookie: 6.0.0
-      type-fest: 5.2.0
+      type-fest: 5.3.0
       until-async: 3.0.2
       yargs: 17.7.2
     optionalDependencies:
@@ -3561,7 +3564,7 @@ snapshots:
       minimist: 1.2.8
       strip-bom: 3.0.0
 
-  type-fest@5.2.0:
+  type-fest@5.3.0:
     dependencies:
       tagged-tag: 1.0.0
 
diff --git a/src/utils/anim-utils.ts b/src/utils/anim-utils.ts
index f1a06552d38..d87ab887607 100644
--- a/src/utils/anim-utils.ts
+++ b/src/utils/anim-utils.ts
@@ -1,22 +1,19 @@
 import { globalScene } from "#app/global-scene";
 import type { SceneBase } from "#app/scene-base";
+import type { OmitIndexSignature, PickIndexSignature } from "type-fest";
+
+type OmitWithoutIndex<O extends object, K extends keyof O> = PickIndexSignature<O> & Omit<OmitIndexSignature<O>, K>;
+
+interface PlayTweenConfig
+  extends OmitWithoutIndex<Phaser.Types.Tweens.TweenBuilderConfig, "onComplete" | "onCompleteParams"> {}
 
 /**
- * Plays a Tween animation, resolving once the animation completes.
+ * Play a Tween animation and wait for its animation to complete.
  * @param config - The config for a single Tween
- * @param scene - The {@linkcode SceneBase} on which the Tween plays; default {@linkcode globalScene}
+ * @param scene - (Default {@linkcode globalScene}) The {@linkcode SceneBase} on which the Tween plays
  * @returns A Promise that resolves once the Tween has been played.
- *
- * @privateRemarks
- * The `config` input should not include an `onComplete` field as that callback is
- * used to resolve the Promise containing the Tween animation.
- * However, `config`'s type cannot be changed to something like `Omit<TweenBuilderConfig, "onComplete">`
- * due to how the type for `TweenBuilderConfig` is defined.
  */
-export async function playTween(
-  config: Phaser.Types.Tweens.TweenBuilderConfig,
-  scene: SceneBase = globalScene,
-): Promise<void> {
+export async function playTween(config: PlayTweenConfig, scene: SceneBase = globalScene): Promise<void> {
   await new Promise(resolve =>
     scene.tweens.add({
       ...config,