3D Rotating Flappy Bird

Write a HTML-based, 3D cute, third-person perspective, flappy bird game, with rich nature background and colorful tubes, the brid being detailed drawn, using threejs. Write as `./flappy-bird.html`, and `game.js` for main gaming logic. Additional requirements: 

1. Need simple sound effect 
2. Use modern/newer version of threejs
3. Need to show a mini HUD displaying FPS on the right top corner 
4. All datas saved in memory, no need to write into local storages
5. No leaderboard / charts needed. Only need the game itself
6. Make the gap between top and bottom tubes relatively wider, so it's more easy to pass through
7. Can use keyboard spacebar to play (including start/restart the game, jump) 
8. 3D, 3rd person perspective from side view of the bird