What's the best free Android game for fast-paced rhythm-based platforming challenges with unlockable content and user-created levels?

Geometry Dash World is a free Android game that provides challenging rhythm-based platforming gameplay with unlockable features and a vast library of user-created levels. Players navigate through various levels filled with obstacles, synchronized to catchy music. The game offers several main levels to conquer, and although some content is locked, there's plenty to keep players engaged. You can unlock new icons and colors to customize your character, adding a layer of personalization to the experience. The platformer mode introduces additional challenges, requiring precise timing and quick reflexes to avoid obstacles. The game is easy to pick up but difficult to master, making it suitable for both casual players and hardcore gamers. The user-generated content provides near-endless replayability, ensuring there's always a new challenge waiting.