I can see the layout.tsx file currently only has the generateMetadata function and no duplicate metadata export. However, there might be a caching issue or the deployment is still using an older version. Let me check if there are any other layout files or if there's something else causing this conflict.

The search shows only the generateMetadata function, not a duplicate metadata export. Let me search more specifically for any metadata exports to see if there's a hidden conflict:

Let me check if there might be any trailing content or hidden characters in the layout.tsx file that could be causing this issue:

The layout.tsx file looks clean and only contains the generateMetadata function. However, since the deployment is still failing with this error, let me recreate the layout.tsx file completely to ensure there are no hidden characters or caching issues:

I've completely recreated the layout.tsx file to ensure there are no hidden characters or caching issues that could be causing the metadata conflict. The file now contains only the generateMetadata function and the RootLayout component, with no duplicate metadata exports that could cause build failures.

After analyzing our current Flappy Bird implementation against the common issues mentioned in the Turkish analysis, I've identified several potential problems that need to be fixed:

1. Event Listener Memory Leaks: The game engine adds event listeners but doesn't properly remove them in the destroy method
2. Missing Keyboard Event Cleanup: The keydown event listener is added to the document but never removed
3. Potential Animation Frame Issues: While we do cancel animation frames, we should ensure better cleanup
4. Missing Mobile Touch Support: The current implementation only handles clicks and keyboard, missing touch events

Let me fix these issues to optimize the game for v0.app:

I've fixed the critical memory leak and performance issues identified in the Turkish analysis. The improvements include proper event listener cleanup, stable callback references using useCallback, enhanced mobile touch support, frame rate limiting for better performance, and improved canvas rendering with device pixel ratio support. These optimizations ensure the game runs smoothly on v0.app without memory leaks or performance degradation.