This HTML file creates a complete Flappy Bird-like game with the following features:

1. A 300x300 pixel game area
2. A bird that flies higher when the space key is pressed and held
3. Obstacles that scroll from right to left
4. A score counter in the top-right corner
5. A lives counter in the top-left corner (3 hits before game over)
6. A welcome screen with a start button
7. A game over screen with a retry button
8. Aesthetic styling using Tailwind CSS

To play the game:

1. Open this HTML file in a web browser.
2. Click the "Start Game" button on the welcome screen.
3. Press and hold the space key to make the bird fly higher and avoid obstacles.
4. Try to survive as long as possible and score points by avoiding obstacles.
5. After losing all three lives, click the "Retry" button to play again.

The game uses Tailwind CSS for styling, which is loaded from a CDN for simplicity. The entire game logic is contained within the HTML file, making it easy to run without any additional setup.