command：
/level - your level, it will auto level up when hit 100 point
/point - your point (get by hunting and mining ore)
/clearlevel [int] - clear your level
/setlevel [int] - set your level (need permission)
/addpoint [int] - add your point (need permission)
/speed [true/false] - turn on or off the speed ability (need over 25 levels)
/fly [true/false] - turn on or off the flying ability (need over 50 levels)
/haste [true/false] - turn on or off the haste ability (need over 100 levels)