Bug : Game doesn't start properly on clicking 'Pong Game'

Upon clicking the "Play Game" button, the game screen loads but:
- The game does **not start** — no paddle or ball movement.
- The **difficulty** and **theme** dropdowns don’t display their options properly.
- After a few seconds of inactivity, it **automatically displays "AI Wins"** — even though the player didn’t play.

**Steps to Reproduce:**
1. Go to the game: [Game Link](https://akki-jaiswal.github.io/pong-game/)
2. Click on "Play Game" without entering a name.
3. Observe:
- Game doesn't actually begin.
- No movement or control is possible.
- Difficulty and Theme dropdowns are mostly non-functional or invisible.
- After 5–10 seconds, it says "AI Wins" without any gameplay.

**Expected Behavior:**
- Clicking "Play Game" should start the match.
- Ball and paddles should be visible and active.
- Difficulty and Theme options should be visible and functional.
- "AI Wins" should only appear after a valid game ends.

**Possible Causes:**
- JavaScript game loop may not be starting correctly.
- Game state might be marked as "running" without rendering.
- Dropdown styles may be conflicting with the dark background.