Setting up the game

2022.3

2020.2

2020.1

2019.4

2019.3

Moving the Player

Moving the Camera

6 Preview

6 Beta

2023.2

2023.1

Setting up the Play Area

Creating Collectibles

Detecting Collisions with Collectibles

Displaying Score and Text

Adding AI Navigation

Building the Game

Use Unity Editor to build a simple game, script its core behavior, add a basic UI, and create a playable build to share.

Add a Rigidbody component, script a PlayerController in C#, and test and debug movement for the Roll-a-ball player sphere.

Position the Camera and script it to follow the Player sphere with a fixed offset in the Roll-a-ball project.

Configure your game’s play area by building one wall, then duplicating and positioning it to form a contained space.

Design a PickUp GameObject, script its rotation, convert it to a Prefab, and instantiate collectibles around the play area.

Update your PlayerController script and PickUp prefab setup so tagged collectibles disappear on trigger while using Rigidbody.

Update the PlayerController and UI Text elements to track collected pickups, show a count, and display an end-of-game message.

Set up a NavMesh with obstacles and script win and lose conditions to drive enemy AI and gameplay.

3D Beginner Game: Roll-a-Ball 6.0 Common Cartridge File

Below you can download a CSV outline and a Common Cartridge file for this course.


Open the CSV outline in spreadsheet software (Excel, Google Sheets) for a summary of all content in the course, with links to each tutorial, exercise, and quiz.


Use the Common Cartridge file to import the course content into your Learning Management System (such as Canvas, Moodle, Blackboard, etc.). See instructions from your LMS provider for importing Common Cartridge files.

Welcome to 3D Beginner: Roll-a-Ball Game! In this learning project, you’ll:  

Use Unity Editor and its built-in capabilities to set up a simple game environment

Write your own custom scripts to create the game functionality

Create a basic user interface to improve the game experience

Build your game, so other people can play it!

3D Beginner Game: Roll-a-Ball

e44466b3-8d27-5277-89ef-a74e87525d51:undefined

a simple roll the ball game. Move and collect cubes. Run from enemy!

RollTheBall 2026-04-13 12-49-24.mp4

RollTheBall

Aslı Aslan

a short game where you become a sphere and are chased by a rectangle while collecting yellow points

chased by a rectangled

AmFFK100

Roll-a-ball

vladweb3

simple 3d game to roll a ball and flee from the enemy

Building the Game

Exercise complete!