https://lennonx0904.github.io/KEYDOWN/ - A music rhythm game which can play by keyboard or touch screen. Registered members can store their records to databases and battle with other players. - A Single Page Application that manages data flow with React, Redux - Managed asynced data flow with Redux-Thunk - Implemented real-time game by canvas element without libraries - Local Storage for storing the player's current score - Firebase Service included Authentication, Cloud Firestore, and Storage - Built the main function with plain JavaScript to control game flow and visual effects