Roblox - Race Car Script

-- This works in FE, tested via Roblox Studio's "Test" tab.

local speed = 92
local equipped
local plr = game:GetService("Players").LocalPlayer
local plrchar = plr.Character or plr.CharacterAdded:Wait()

local tool = Instance.new("Tool", plr:WaitForChild("Backpack"))
tool.Name = "RaceCar"
local handle = Instance.new("Part", tool)
handle.Name = "Handle"
handle.CanCollide = true
handle.Anchored = false
local mesh = Instance.new("SpecialMesh", handle)
mesh.MeshId = "http://www.roblox.com/asset/?id=264666411"
mesh.TextureId = "http://www.roblox.com/asset/?id=264326115"
mesh.Scale = Vector3.new(3, 3, 3)

local gui = Instance.new("ScreenGui", plr:WaitForChild("PlayerGui"))
gui.Name = "RaceCarGUI"
local frame = Instance.new("Frame", gui)
frame.Size = UDim2.new(1, 0, .3, 0)
frame.Position = UDim2.new(0, 0, .7, 0)
frame.BackgroundTransparency = .5
frame.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
frame.BorderSizePixel = 0
local SetSpeed_label = Instance.new("TextLabel", frame)
SetSpeed_label.Name = "SetSpeed_label"
SetSpeed_label.BorderSizePixel = 0
SetSpeed_label.Size = UDim2.new(1, 0, .25, 0)
SetSpeed_label.Font = Enum.Font.Arcade
SetSpeed_label.Text = "Set Speed"
SetSpeed_label.TextSize = 30
SetSpeed_label.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
local SetSpeed = Instance.new("TextBox", frame)
SetSpeed.BackgroundTransparency = 1
SetSpeed.BorderSizePixel = 0
SetSpeed.Position = UDim2.new(0, 0, .25, 0)
SetSpeed.Size = UDim2.new(1, 0, .75, 0)
SetSpeed.Font = Enum.Font.SourceSansLight
SetSpeed.PlaceholderColor3 = Color3.fromRGB(48, 178, 96)
SetSpeed.PlaceholderText = "Speed in studs"
SetSpeed.Text = ""
SetSpeed.TextScaled = true

local prevSpeed = plrchar:WaitForChild("Humanoid").WalkSpeed
local prevJumpPower = plrchar:WaitForChild("Humanoid").JumpPower

tool.Equipped:Connect(function()
    prevSpeed = plrchar:WaitForChild("Humanoid").WalkSpeed
    prevJumpPower = plrchar:WaitForChild("Humanoid").JumpPower
    -- In case the player has set another speed
    plrchar:WaitForChild("Humanoid").WalkSpeed = speed
    plrchar:WaitForChild("Humanoid").JumpPower = 1
    equipped = true
end)

tool.Unequipped:Connect(function()
    plrchar:WaitForChild("Humanoid").WalkSpeed = prevSpeed
    plrchar:WaitForChild("Humanoid").JumpPower = prevJumpPower
    equipped = false
end)

function SignalError()
    SetSpeed_label.TextColor3 = Color3.fromRGB(232, 23, 23)
    wait(3)
    SetSpeed_label.TextColor3 = Color3.new(0, 0, 0)
end

function SignalSuccess()
    SetSpeed_label.TextColor3 = Color3.fromRGB(51, 204, 40)
    wait(3)
    SetSpeed_label.TextColor3 = Color3.new(0, 0, 0)
end

SetSpeed.FocusLost:Connect(function(enter)
    if enter == true then
        if tonumber(SetSpeed.Text) ~= nil then
            speed = tonumber(SetSpeed.Text)
            if equipped == true then
                plrchar:WaitForChild("Humanoid").WalkSpeed = speed
            end
            SignalSuccess()
            SetSpeed.Text = ""
        else
            SignalError()
            SetSpeed.Text = ""
        end
    else
        SetSpeed.Text = ""
    end
end)

plrchar:WaitForChild("Humanoid").Died:Connect(function()
    gui:Destroy()
    script:Destroy()
end)