Mega Easy Obby 725 Stages Script

i haven't released anything in a pretty long time so heres a script i made in a few minutes
note: you have to go through the portals yourself :/

-- game: https://www.roblox.com/games/3587619225/Mega-Easy-Obby-725-Stages
-- creator: spoorloos#1109
local speed = 100

local tweenService = game:GetService("TweenService");
local workSpace = game:GetService("Workspace");
local players = game:GetService("Players");
local localPlayer = players.LocalPlayer;
local checkPoints = workSpace.Checkpoints;

assert(checkPoints, "couldn't find checkpoints.");
assert(localPlayer.Character, "couldn't find character.");
assert(localPlayer.Character.HumanoidRootPart, "couldn't find rootpart.");

local function tweenTeleport(part, targetPosition, studsPerSecond)
    local tweenTime = (part.Position - targetPosition).magnitude / studsPerSecond;
    local tween = tweenService:Create(part, TweenInfo.new(tweenTime), { CFrame = CFrame.new(targetPosition) });
    tween:Play();
    return tween.Completed:Wait();
end

local humanoidRootPart = localPlayer.Character:FindFirstChild("HumanoidRootPart");
local start = localPlayer.leaderstats["Stage"].value;
for index = (start + 1), #checkPoints:GetChildren() do
    local checkPoint = checkPoints:FindFirstChild(index);
    if (checkPoint) then
        local startPos = humanoidRootPart.Position;
        local lastPos = checkPoint.Position + Vector3.new(0, 2.5, 0);
        local middlePos = (startPos + lastPos) / 2 + Vector3.new(0, 50, 0);
        
        tweenTeleport(humanoidRootPart, middlePos, speed);
        tweenTeleport(humanoidRootPart, lastPos, speed);
    end
end