Climb in air keybind script

local plr     = game:GetService("Players").LocalPlayer
local hum     = plr.Character.Humanoid
local hrp     = plr.Character.HumanoidRootPart
hum.JumpPower = 50

local function y()
    local fun            = Instance.new("TrussPart")
    fun.Parent           = game.Workspace
    fun.Name             = "fun"
    fun.Size             = Vector3.new(2,6,2)
    fun.CollisionGroupId = 1
    hrp.CollisionGroupId = 3
    fun.Transparency     = 1

    fun.CanCollide = true
    fun.CanTouch   = true
    local con

    con        = game:GetService("RunService").RenderStepped:Connect(function()
    fun.CFrame = hrp.CFrame + hrp.CFrame.LookVector * 1.5
    end)
end

local function n()
    game.Workspace.fun:Destroy()
end

game:GetService("UserInputService").InputBegan:Connect(function(i, g)
    if i.KeyCode == Enum.KeyCode.E and not g then
        y()
    elseif i.KeyCode == Enum.KeyCode.R and not g then
        n()
    end
end)

local function respawn(character)
    hum           = character:WaitForChild("Humanoid")
    hrp           = character:WaitForChild("HumanoidRootPart")
    hum.JumpPower = 50
end

plr.CharacterAdded:Connect(respawn)
if plr.Character then
    respawn(plr.Character)
end