How to change part properties once button is pressed locally?

In order to change the properties of a part for a single person, you can use a remote event to change the property from a local script. Insert a remote event into ReplicatedStorage and name it "PropertyChange". Once this is done we can start working on the script. Your ServerScript is mostly set up how it needs to be but we can copy and paste the parts that change the properties to a notepad or somewhere else accessible so you can copy it. Your new script should look like this:

local played = false

script.Parent.Touched:Connect(function(h)
    local hum = h.Parent:FindFirstChild("Humanoid")
    if hum then
        game.ReplicatedStorage.PropertyChange:FireClient(game.Players[h.Parent.Name])

--I also took away two of the touched events, as you can just change both properties and play the sound in the same one.

	end
end)

Now in order for that script to work successfully we need a LocalScript in the StarterPlayerScripts folder (also move your audio here). The contents of this script will read as follows:

game.ReplicatedStorage.PropertyChange.OnClientEvent:Connect(function()
	game.Players.LocalPlayer.PlayerScripts.--[[reference your audio]]:Play()
	--[[reference the part you're changing]].Transparency = 0
	--[[reference the part you're changing]].CanCollide = true
end)

This should work but I don't have access to studio currently so comment any errors if they should arise. Hope I helped you out.