Why leaderstats don't apear?

Make sure you put this script on ServerScriptService.

game:GetService("Players").PlayerAdded:Connect(funtion(player)
    local leaderstats = Instance.new("Folder", player) 
    leaderstats.Name = "leaderstats" 

    local menu = Instance.new("IntValue", leaderstats) 
    menu.Name = "Taps"
end)

Don't put 2 different function in the same script, it's harder to find them. You should split the script 2 parts. So heres the another part.

Also, a note, you don't need to use RemoteEvent on the same script. RemoteEvent is used for sending information between server and client (yourself). Even you need to send them between scripts, you still can access the ClickDetector in one script. No RemoteEvent are needed.

What you are gonna do in the another script. Make this as a script and put it in ServerScriptService as well.

game:GetService("Players").PlayerAdded:Connect(function(player)
    wait()
    local ClickDetector = game.Workspace.Part.ClickDetector

    ClickDetector.MouseClick:Connect(function()
        player.leaderstats.Taps.Value = player.leaderstats.Taps.Value + 1
    end)
end)

Try this code out buddy!

Put this code in a script from serverscriptservice

game.Players.PlayerAdded:Connect(function(player)

    local leaderstats = Instance.new(¨Folder¨)
    leaderstats.Name = ¨leaderstats¨
    leaderstats.Parent = player

    local taps = Instance.new(¨IntValue¨)
    taps.Name = ¨Taps¨
    taps.Value = 0
    taps.Parent = leaderstats

end)

I think that a leaderboard only "gets created" when the game has initiated, I don't think that you can make a new value in the middle of the game, roblox has already made the leaderstats. /shrug