how do I fix speedhack?

How would I make any hackers on my game get shutdown if use of over speed hack

Since you basically requested a script instead of attempting to make one, I'll just link you to one here.

you would have to make it where if someone goes over a speed they get shutdown.

function speed()
if game.Workspace:findFirstChild("Humanoid")
then
elseif Humanoid.Walkspeed ~= {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16} -- so that any speed 16 and below are safe.
then plr:Kick()
end
end

This script May not work, As Im not used to making these types of scripts Hope I helped.

I am not 100% sure this will work.

Put this in a LocalScript in StarterPack

player = game.Players.LocalPlayer
if player.Character.Humanoid.WalkSpeed ~= 16 then
	player:Kick()
end