Are you ready to dive into the world of game development and unleash your creativity? Look no further! In this comprehensive tutorial, we'll be building a complete Flappy Bird clone using Unity 2D from scratch. Whether you're a beginner or an intermediate developer, this guide will take you on a journey to master game physics, infinite scrolling, UI systems, and mobile optimization.

Getting Started with AI in Mobile Apps

Before we begin, let's rename our game to Flappy Fish, which will be similar in style to the original Flappy Bird. If you want to get hold of a copy of these images, please download the source code for this project here.

Organizing Your Project

To start off, we'll organize our project so it's more clean and easy to work with. In our Assets folder, we'll create a few folders: Background, Sprites, SpriteSheets, like below.

Creating an Infinite Scrolling Background

Let's now start off with the easiest part – creating a scrolling infinite background. This will allow us to have the feeling of an infinite level, which is great for hyper-casual game styles like Flappy Bird.

To do this, we'll create a quad and resize it to be the size of our Unity camera view. Then, we'll add our background image on top of the quad in the Scene view. This will create a new background material.

Configuring the Background Material

Make sure you've checked the repeat option and clicked Apply. Now, let's move on to creating our background scrolling script.

Background Scrolling Script

To create our background scrolling script, head back into your Assets folder and create a new folder called Scripts. Inside your Scripts folder, create a new C# script and name it BackgroundScroller.cs.

The trick to infinite scrolling backgrounds is to shift the texture offset. So, as you can tell this tutorial is not just about making a Flappy Bird game in Unity but also will teach you some techniques that could help with your own projects.

Demonstrating Infinite Scrolling

To demonstrate how this works, we'll first need to get our background to show properly. So, you might have some dark background like this at the moment.

To fix this, we need to choose another shader that doesn't require lighting. So, head over to your background quad in the Hierarchy and change your shader from Standard to Unlit/Texture.

Implementing AI in Mobile Apps

Now, let's look at how we'll be doing the infinite scroll. If you head over to your Background -> Materials folder and double-click on the Background Material, you'll see this.

To make our background scroll, we need to change the offset of x. The values need to be between 0 and 1. So, in our script, we'll want to rotate this value counting up to 1 then resetting this value back to 0.

Here's our code for the scrolling background:

`csharp

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class ScrollingBackground : MonoBehaviour

{

private Renderer renderer;

public float scrollSpeed = .1f;

void Start()

{

renderer = GetComponent();

}

// Update is called once per frame

void Update()

{

float x = Mathf.Repeat(Time.time * scrollSpeed, 1);

Vector2 offset = new Vector2(x, 0);

renderer.sharedMaterial.SetTextureOffset("_MainTex", offset);

}

}

`

By following this tutorial, you'll gain a solid understanding of how to integrate AI in mobile apps and create engaging game experiences.