help with tutorial change

[slim mesa]

local Character = script.Parent;
local Humanoid = Character:WaitForChild("Humanoid");
local HumanoidRootPart = Character:WaitForChild("HumanoidRootPart");

local SideGyro = Instance.new("BodyGyro")
SideGyro.MaxTorque = Vector3.new(3e5,0,3e5)
SideGyro.P = 5e5
SideGyro.Parent = HumanoidRootPart

local RunService = game:GetService('RunService')
local UserInputService = game:GetService('UserInputService')

local Dashing = false    
local DashSpeed = 45    
local DoubleTaps = {}

local Animations = {
    ["DashRight"] = 'rbxassetid://12878249954';
    ["DashLeft"] = 'rbxassetid://12878251537';
    ["DashFront"] = 'rbxassetid://12878253087';
    ["DashBack"] = 'rbxassetid://12878254845';
}

for i,v in pairs(Animations) do
    local Anim = Instance.new("Animation")
    Anim.AnimationId = v
    Anim = Humanoid:LoadAnimation(Anim)
    Animations[i] = Anim
end

function Dash(Key)
    if Dashing then
        return
    end

    local DashAnim = "Back"
    local Front = -1
    local Side = 0

    if Key == Enum.KeyCode.A then
        Side=-1
        Front = 0
        DashAnim = "Left"
    end

    if Key == Enum.KeyCode.D then
        Side=1
        Front = 0
        DashAnim = "Right"
    end

    if Key == Enum.KeyCode.W then
        Side=0
        Front = 1
        DashAnim = "Front"
    end

    if Key == Enum.KeyCode.S then
        Side=0
        Front = -1
        DashAnim = "Back"
    end

    Dashing = true
    Animations["Dash"..DashAnim]:Play()

    local DashVelocity = Instance.new("BodyVelocity")
    DashVelocity.MaxForce = Vector3.new(math.huge,0,math.huge)
    DashVelocity.P = 9e9
    DashVelocity.Parent = HumanoidRootPart
    DashVelocity.Velocity = HumanoidRootPart.CFrame.LookVector * (Front * DashSpeed) + HumanoidRootPart.CFrame.RightVector * (Side * DashSpeed) 

    coroutine.wrap(function()
        task.wait(.1)
        local DashEffect = game.ReplicatedStorage.DustTrail:Clone();
        DashEffect.Parent = workspace;

        if DashAnim == "Left" then
            DashEffect.DustRight:Destroy();
            DashEffect.CFrame = Character["Right Leg"].CFrame * CFrame.new(-1,0,-2);
        else if DashAnim == "Right" then
                DashEffect.DustLeft:Destroy();
                DashEffect.CFrame = Character["Left Leg"].CFrame * CFrame.new(3,2,5);
            else if DashAnim == "Front" then
                    DashEffect.DustLeft:Destroy();
                    DashEffect.CFrame = Character.HumanoidRootPart.CFrame * CFrame.new(0,-1,3);
                else
                    DashEffect.DustLeft:Destroy();
                    DashEffect.CFrame = Character.HumanoidRootPart.CFrame * CFrame.new(0,-1,-.5);
                end
            end
        end

        for i,v in pairs(DashEffect:GetDescendants()) do
            if not v:IsA("ParticleEmitter") then continue end
            v:Emit(5);
        end

        game.Debris:AddItem(DashEffect, .5);
    end)()


    repeat wait()     DashVelocity.Velocity = HumanoidRootPart.CFrame.LookVector * (Front * DashSpeed) + HumanoidRootPart.CFrame.RightVector * (Side * DashSpeed) 
    until not Animations["Dash"..DashAnim].IsPlaying
    Dashing = false
    DashVelocity:Destroy()
end

function LoadDoubleTap(Key,Funct)
    UserInputService.InputBegan:Connect(function(Pressed,Typing)
        if Pressed.KeyCode == Enum.KeyCode.Q then

            if UserInputService:IsKeyDown(Key) == true then
                    Funct(Key)
            end
        end
    end)
end

LoadDoubleTap(Enum.KeyCode.W,Dash)
LoadDoubleTap(Enum.KeyCode.A,Dash)
LoadDoubleTap(Enum.KeyCode.S,Dash)
LoadDoubleTap(Enum.KeyCode.D,Dash)

it just wont stop the dashing