i tried this script out and when i clicked f nothing happened what am i doing wrong?

local repatore = game:WaitForChild("ReplicatedStorage")
local Remote = repatore:WaitForChild("iceStart")


Player = game.Players.LocalPlayer
Mouse = Player:GetMouse()

cool = true

Mouse.KeyDown:connect(function(key)
key = key:lower()
if key == "f" then
	 if cool == true then return end
	 cool = false
	
	print("Worked")
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	wait(5)
end
end)

KeyDown is deprecated, you will need to use the UIS (UserInputService) instead.

local repatore = game:WaitForChild("ReplicatedStorage")
local Remote = repatore:WaitForChild("iceStart")

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()

local cool = true

game:GetService("UserInputService").InputBegan:Connect(function(inputObject, gameProcessedEvent)
	if inputObject.KeyCode == Enum.KeyCode.F then
		if cool == false then return end
		cool = false
	    
		print("Worked")
		
		wait(5)
		cool = true
	end
end)

Also, assuming "cool" is a debounce, you will want it to function as above in the script (reversing the bool positions), since otherwise, having defined "cool" as true to begin with, the script will never run past the "return end" line.