Make a Flappy Bird Game From Scratch in Unity 6.3 & C#

Create a new project in Unity, configure your layout to your liking, and setup some folders to work with.

The main camera, importing sprites into Unity, and the world units that Unity uses.

Compiling, importing and working with sprite sheets, creating a basic animated sprite, and sprite sorting layers.

Introduction to the physics system in Unity, and making objects respond to gravity.

Introduction to Unity scripting, granularity of scripts, how the game update loop works.

Reading keyboard and mouse input, and Unity's two input systems.

Using components from code, adding physics forces, debug logging to the console, and serialized fields

The Start method, adjusting serialized fields, and rotating objects

How to create a Git repository for your game from within Visual Studio.

Import and place the bricks sprites in the scene.

Creating colliders for objects - circle, capsule and box colliders.

How colliders work within the physics system. Creating a prefab.

Collision detection, the Unity timescale, scene reloading & editing prefabs.

Transform objects, sprite scaling, and tweaking parameters to affect gameplay.

The bricks script, the MonoBehaviour class, moving objects in code, delta time, destroying objects

Bricks spawner, timers, instantiating objects, and random numbers.

Constraining movement, adding a ground object using a tiled sprite.

Using Krita to edit third party art assets.

Creating a TextMeshPro object to display the score.

Different approaches to detecting whether a point has been scored, trigger colliders.

Updating the score text from within the code when the bird has moved past the bricks.

Creating a basic animation and triggering it from within the code.

Manipulating the timescale and reloading the scene after a delay using the Invoke method.

Two further suggestions to tweak / extend the game on your own.

Unity 6.3 was released on December 4th 2025, and it is an LTS (Long Term Support) release and is now the recommended Unity version to use. Let's upgrade the project accordingly.

So far we have only run the game from within the Unity editor. In this lesson we'll learn about building the game for distribution, starting with understanding build profiles.

Before building the game, we'll want to change some of the project settings, paying particular attention to the output resolution of the build.

With the build and project settings configured, we can direct Unity to go ahead and build the game.

We're going to be publishing on the itch.io website. First let's take a quick tour of the site and find out what it's all about and why we might want to publish there.

It's finally time to publish the game for the world to see! I walk you through the creation and publication of a new game project on the Itch platform.

Discussing ideas for extending the game, and how to get in touch if you need help.