Add README.md with Hugging Face Spaces configuration

README.md

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+---
+title: Audio Geo-Localization Game
+emoji: 🎵🌍
+colorFrom: blue
+colorTo: green
+sdk: gradio
+sdk_version: "5.49.1"
+app_file: app.py
+pinned: false
+---
+
+# Audio Geo-Localization Game
+
+An interactive game where players listen to audio clips and guess their geographic location on a world map.
+
+## How to Play
+
+1. Listen to the audio clip
+2. Click on the interactive map to set your guess coordinates
+3. Submit your answer
+4. View the correct answer and your error distance
+
+## Features
+
+- Interactive world map with zoom and pan
+- Audio playback for location clues
+- Real-time coordinate input
+- Previous round answer display with OpenStreetMap links
+