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Recap: Level Select

Part of the Building Real Games section of Coddy's Unity journey. Lesson 21 of 60.

This recap puts the chapter together: a manager that survives scene loads with DontDestroyOnLoad, and buttons that load scenes by name or number. Finishing a level opens the next one on the menu.

challenge icon

Challenge

Easy

Build a level select that opens levels as they are finished.

  1. Progress.Awake(): destroy a newcomer and return, else set Instance and call DontDestroyOnLoad(gameObject).
  2. LevelDone(int level): unlocked = Mathf.Max(unlocked, level + 1);, then load Menu.
  3. LevelSelect.Start(): button i loads level i + 1 (copy it first) and is interactable only up to Progress.Instance.unlocked.

Press Play and finish Level 1: the Level 2 button opens. Then Check.

Try it yourself

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class LevelSelect : MonoBehaviour
{
    public Button[] levelButtons;

    void Start()
    {
        // each button opens its level; locked levels cannot be clicked
    }
}
quiz iconTest yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Building Real Games

1On-Screen Text

Canvas and TextShow the ScoreFormat NumbersA Countdown TimerRecap: Speedometer

4Scenes and Levels

Load a SceneRestart the LevelNext LevelKeep Between ScenesRecap: Level Select

7Time Control

Pause with timeScaleSlow MotionUnscaled TimeRecap: Bullet Time

10Project: 3D Platformer

The CourseMoving PlatformsProject lessonRide the PlatformProject lessonFall and RespawnProject lessonReach a CheckpointProject lessonGems on ScreenProject lessonFinish LineProject lessonBest TimeProject lesson

2Buttons and Screens

Buttons and onClickLambdasWiring in the InspectorPanels On and OffHealth BarsRecap: Upgrade Shop

5Saving with PlayerPrefs

Save a NumberLoad with a DefaultHigh ScoreSave SettingsRecap: Coins in the Bank

8Character Controller

CharacterController.MoveGravity by HandJumpingPushing ThingsMove Where You LookRecap: Double Jump

11Final Challenges

Shop and InventoryTime TrialSurvival NightThe End of the Night

3The Game Manager

One Script Runs the GameThe SingletonGame StatesSwitching on the StateRecap: Round Manager

6Project: Endless Runner

Three LanesObstacles AheadProject lessonSpeeding UpProject lessonScore on ScreenProject lessonCrash Ends the RunProject lessonRun AgainProject lessonBest RunProject lesson

9The New Input System

Two Input SystemsKeyboard and MousePressed This FrameInput ActionsRecap: Input Swap

Practice on your own: Unity playground