e1338 用BearRiver（也许还有MVars）重写e1337 克隆存储库， cabal build ，./ ./run.sh w,a,s,d,q,e - 6-axis movement PgUp/PgDown - roll left/right arrow keys, mouse controls - yaw, pitch LCtrl - slow LShift - fast LCtrl + LShift - very fast C