How do I make this FE Compatible?

game.Players.PlayerAdded:connect(function(Player) ----- When a Player joins a server this function happens
    local Data = Instance.new("IntValue",Player) ----Makes an IntValue inside Player
    Data.Name = "Data" -----It's name is Data ([Note]: You could change it to leaderstats if you would like a leaderboard with it.)
    local XP = Instance.new("IntValue",Data) ----Makes a IntValue inside Data
    XP.Name = "XP" 
    XP.Value = 0
    local Level = Instance.new("IntValue",Data) ------- Makes an IntValue Inside Data
    Level.Name = "Level" ------- It's name is Level
    Level.Value = 1     
    XP.Changed:connect(function() XPChange(Player,XP,Level) end) ---- To change the XP, XPChanged function occours

end)

function XPChange(Player,XP,Level) ------ XPChanged function
    if XP.Value >= Level.Value*150  then ----- this function occours happens if the Level's Value is greater or equal to this 150 ([Note]: Change 150 to the max XP)
        XP.Value = 0 --- Resets the XP
        Level.Value = Level.Value+ 1
    end
end