diff --git a/examples/arcade-server/server.ts b/examples/arcade-server/server.ts
index 50afaa96..e42c6c33 100644
--- a/examples/arcade-server/server.ts
+++ b/examples/arcade-server/server.ts
@@ -40,7 +40,8 @@ function validateGameId(gameId: string): boolean {
     !gameId.includes("/") &&
     !gameId.includes("?") &&
     !gameId.includes("#") &&
-    !gameId.includes("..")
+    !gameId.includes("..") &&
+    !/\s/.test(gameId)
   );
 }