How to allow restrictions on movement?

local player = game.Players.LocalPlayer
local RunService = game:GetService('RunService')
local ContextActionService = game:GetService('ContextActionService')

local jumping = false
local leftValue, rightValue = 0, 0

local function onLeft(actionName, inputState)
    if inputState == Enum.UserInputState.Begin then 
        leftValue = 1
    elseif inputState == Enum.UserInputState.End then
        leftValue = 0
    end
end

local function onRight(actionName, inputState)
    if inputState == Enum.UserInputState.Begin then
        rightValue = 1
    elseif inputState == Enum.UserInputState.End then
        rightValue = 0
    end
end

local function onJump(actionName, inputState)
    if inputState == Enum.UserInputState.Begin then
        jumping = true
    elseif inputState == Enum.UserInputState.End then
        jumping = false
    end
end

local function onUpdate()
    if player.Character and player.Character:FindFirstChild('Humanoid') then
        if jumping then
            player.Character.Humanoid.Jump = true
        end
        local moveDirection = rightValue - leftValue
        player.Character.Humanoid:Move(Vector3.new(moveDirection,0,0), false)
    end
end

RunService:BindToRenderStep('Control', Enum.RenderPriority.Input.Value, onUpdate)

ContextActionService:BindAction('Left', onLeft, true, 'a', Enum.KeyCode.Left, Enum.KeyCode.DPadLeft)

ContextActionService:BindAction('Right', onRight, true, 'd', Enum.KeyCode.Right, Enum.KeyCode.DPadRight)

ContextActionService:BindAction('Jump', onJump, true, 'w', Enum.KeyCode.Space, Enum.KeyCode.Up, Enum.KeyCode.DPadUp, Enum.KeyCode.ButtonA)

So, at the bottom where the inputs are turned into movments, i want to add an if statement and only allow moveent if a certain value has a speccific value, but if i do this, the code will run over the if staements if they are false and never run them again