🦊

Lumo says: this is a bigger project than the obby, so we build it in three episodes. Do them in order. Episode 1 makes the game run, Episode 2 makes the maps, and Episode 3 adds the pushing and the final.

📦

Prefer to lay it out visually? The Roblox Mod Studio lets you place platforms and scripts in the browser, then download a model to drop into Studio. Every code block also has a Copy button.

🧰

Set Up the Project

Create the folders, the shared Config and the RemoteEvent the game talks through

Active

🎯

Goal for this step

Get a clean project structure so the server and the player screens can talk to each other.

👨‍👧

Parent note: Roblox games have two halves. The server runs the rules, and each player's computer runs the client. They swap small messages through a RemoteEvent. This step sets that up.

Build the structure

1Open Roblox Studio with a new Baseplate. Delete the Baseplate and the SpawnLocation.
2In ReplicatedStorage, right-click and add a RemoteEvent. Rename it ObbyEvent.
3In ReplicatedStorage, add a ModuleScript called Config. This holds all your tuning numbers in one place.
4In ServerScriptService, add a Script called ObbyServer.
5In StarterPlayer → StarterPlayerScripts, add a LocalScript called ObbyClient.

Config (ModuleScript)

-- ReplicatedStorage/Config
local Config = {}

Config.MIN_PLAYERS = 2     -- need this many to start
Config.START_COUNTDOWN = 15  -- seconds in the lobby
Config.ROUND_TIME = 150      -- seconds per round
Config.WALK_SPEED = 24

return Config

💡

A ModuleScript is a box of code you can require() from anywhere. Keeping the numbers here means you change them once, not in ten scripts.

🧠

Knowledge Check

+15 XP

Where does the server script live, the one that runs the rules?

AStarterPlayerScripts

BServerScriptService

CReplicatedStorage

🏟️

Build the Lobby

A big floating platform where players wait, and code that places them on it

Locked

🎯

Goal for this step

A safe platform high in the sky, and a helper that moves any player onto it.

1Insert a Part. In Properties set Size to 70, 2, 70 and Position to 0, 600, 0.
2Tick Anchored so it never falls. Rename it LobbyFloor.
3Now the code: when a player joins, we load their character and move it to the lobby.

ObbyServer (Script)

local Players = game:GetService("Players")

-- players do not spawn on their own; we move them
Players.CharacterAutoLoads = false

local lobbyCF = CFrame.new(0, 605, 0)   -- above the floor

local function placeAt(player, cf)
    local character = player:LoadCharacterAsync()
    character:PivotTo(cf)
    return character
end

Players.PlayerAdded:Connect(function(player)
    placeAt(player, lobbyCF)
end)

🔧

Stuck? If players fall through the air, check the floor is Anchored. If nobody appears, check CharacterAutoLoads is set to false (that is lowercase, not "false").

📝Fill in the Concept+15 XP

Players wait in the until there are enough of them. When the match is about to start, a short ticks down.

🧠

Knowledge Check

+15 XP

Why do we set CharacterAutoLoads = false?

ASo we control when and where each player spawns

BTo make the game load faster

CTo stop players from jumping

🔁

The Match Loop

One forever-loop that runs the whole game, stage by stage

Locked

🎯

Goal for this step

An endless loop that repeats the match forever, changing a "phase" as it goes.

Real party games never stop. When one match ends, the next begins. We do that with a while loop and a phase word that tells us where we are:

ObbyServer (Script)

local phase = "lobby"   -- lobby -> start -> race -> final

while true do
    phase = "lobby"
    waitForPlayers()   -- step 4 fills this in

    phase = "start"
    countdown()         -- step 4 fills this in

    phase = "race"
    runRound()          -- step 5 fills this in
end

💡

Why while true? It means "keep doing this forever". Each time round the loop is one whole match. Changing phase is how the game knows which stage it is in.

⌨️

Code Challenge

+20 XP

Fill in the three blanks that make the loop run forever:

  do
    runRound()

Hint: the keyword that starts a loop, the value that is always true, and the keyword that closes a block.

🔢

Put the phases in order

+15 XP

Click the match phases in the order the game runs them:

Lobby (wait for players)

Countdown

Race

Final

🧠

Knowledge Check

+15 XP

What does the phase variable tell us?

AHow many players are online right now

BWhich stage of the match we are in

CHow much time is left

⏱️

Wait, Count Down, Launch

Fill in the two helper functions that start a match

Locked

🎯

Goal for this step

Wait until 2 players are ready, show a countdown, then send everyone to the course.

1waitForPlayers just waits until the player count reaches Config.MIN_PLAYERS.
2countdown ticks from 15 to 0, writing the number onto a player attribute so every screen can show it.

ObbyServer (Script)

local function waitForPlayers()
    while #Players:GetPlayers() < Config.MIN_PLAYERS do
        task.wait(1)
    end
end

local function countdown()
    for i = Config.START_COUNTDOWN, 1, -1 do
        for _, player in ipairs(Players:GetPlayers()) do
            player:SetAttribute("Countdown", i)
        end
        task.wait(1)
    end
end

💡

What is an attribute? A tiny value you stick onto a player or a part. It copies to every player's screen automatically, so the client can read player:GetAttribute("Countdown") and show it. No messages needed.

🧠

Knowledge Check

+15 XP

How does the countdown reach every player's screen?

AWe print it in the Output window

BWe set a player attribute the client reads

CWe change the Lighting properties

🏁

Run One Round

A placeholder round that moves everyone to the course and back

Locked

🎯

Goal for this step

A real round function that the loop can call. Episode 2 builds the actual course it drops you onto.

1Make a start platform far away, for example a Part at 0, 0, 0 sized 30, 2, 22.
2Set startCF to a CFrame above it, then move every player there at the start of a round.

ObbyServer (Script)

local startCF = CFrame.new(0, 5, 0)

local function runRound()
    for _, player in ipairs(Players:GetPlayers()) do
        placeAt(player, startCF)      -- onto the course
        player:SetAttribute("Running", true)
    end

    task.wait(Config.ROUND_TIME)           -- the race would run here

    for _, player in ipairs(Players:GetPlayers()) do
        player:SetAttribute("Running", false)
    end
end

💡

Right now the round just waits. That is on purpose. Episode 2 replaces the empty wait with a real course you race across.

⌨️

Code Challenge

+20 XP

Loop over every player and move them to the start:

for _, player in (Players:GetPlayers()) do
    local cf = .new(0, 5, 0)
    placeAt(player, cf)
end

Hint: the iterator for a list, and the object that describes a position and facing.

🧠

Knowledge Check

+15 XP

What does CFrame.new(0, 5, 0) describe?

AA colour

BA size of 0 by 5 by 0

CA position in the world, 5 studs up

🧪

Test With Two Players

Run the game with a second player and watch a full loop

Locked

🎯

Goal for this step

Confirm the loop works: two players, a countdown, then both get moved to the course.

1Click Test at the top, then Clients and Servers, and set Players to 2.
2Click Start. You should see two characters standing on the lobby floor.
3Within a second the countdown starts. When it hits 0 both players jump to the course platform.
4After 150 seconds the round ends and the loop begins again. That is one full match.

🔧

Nothing moves? Check the Output window for red errors. The most common one is a typo in a function name, or a Config value that is still a string.

👨‍👧

Try this together: change Config.START_COUNTDOWN to 3 and start again. The match begins much faster. That is the power of keeping numbers in one Config file.

🧠

Knowledge Check

+15 XP

How many players must be present before the match starts in this episode?

A2, set by Config.MIN_PLAYERS

B8, one for each episode

CAt least 10

SIM LOCKDOWNThe Match Loop

Build the structure

SIM LOCKDOWN
The Match Loop