npx run dev 하면 cannot find module 에러가 발생해서여

안녕하세여 강사님 ~!

질문이 하나 있습니다.

npx run dev 하면 cannot find module 에러가 발생해서여 ~!

어디에서 오타를 쓴걸까여?

npx -v 를 실행하면 에러는 없는데 

(base) C:\react_game_prac2>npx run dev

npx: installed 5 in 2.655s

Watching C:\react_game_prac2 and all sub-directories not excluded by your .gitignore. Will not monitor dotfiles.

Found & ignored ./node_modules ; is listed in .gitignore

Starting: dev

internal/modules/cjs/loader.js:638

    throw err;

    ^

Error: Cannot find module 'C:\react_game_prac2\dev'

    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)

    at Function.Module._load (internal/modules/cjs/loader.js:562:25)

    at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)

    at startup (internal/bootstrap/node.js:283:19)

    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)

이렇게 에러가 발생해서여 

혹시 이유를 알려주시면 대단히 감사여 

https://github.com/hyunsokstar/react_game_prac2