'setBgmVolume' is assigned a value but never used

'bgmVolume' is assigned a value but never used

React Hook useEffect has a missing dependency: 'getRankingData'. Either include it or remove the dependency array

'retryBtn' is defined but never used

'css' is defined but never used

'useMemo' is defined but never used

React Hook useEffect has a missing dependency: 'playSound'. Either include it or remove the dependency array

'keyboardMap' is assigned a value but never used

Assignments to the 'lastMoveTime' variable from inside React Hook useEffect will be lost after each render. To preserve the value over time, store it in a useRef Hook and keep the mutable value in the '.current' property. Otherwise, you can move this variable directly inside useEffect