Building Your First 2D Platformer in Unity

5 August 2026

So, you want to build your own 2D platformer in Unity? That’s awesome! Whether you’ve been inspired by the nostalgic magic of Super Mario Bros, the pixel-perfect mechanics of Celeste, or you're just itching to bring your game design dreams to life, you’re in the right place.

Creating your first 2D platformer may feel like a massive leap, especially if you're new to Unity or game development in general. But don’t worry—I’ve got your back. This guide will walk you through everything—from setting up your project in Unity to adding that final polish that gets players hooked.

Let’s fire up Unity and make some pixelated dreams come true!

Why Start with a 2D Platformer?

Before we dive headfirst into Unity, let’s talk about why a 2D platformer is actually a super smart place to begin.

2D games tend to be simpler to build. Yup, less moving parts (literally). It allows you to focus on core gameplay mechanics—like movement, collisions, and game physics—without getting overwhelmed by 3D modeling and camera work.

Plus, platformers are timeless! They’re fun, flexible, and let you flex your creative muscles. You can prioritize pixel art, experiment with level design, and test different gameplay mechanics—all in a manageable scope.

Step 1: Setting Up Unity for 2D Game Development

Alright, first things first—let’s set up your development environment.

? Download Unity Hub

If you haven’t already, go to the official Unity website and snag Unity Hub. It’s your central command center for creating and managing Unity projects.

When installing Unity, make sure you include:

- 2D Game Kit
- Visual Studio (for scripting)
- Android/iOS build support (optional, but cool if you're thinking mobile)

? Create a New Project

- Open Unity Hub.
- Click on "New Project."
- Select the "2D Core" template (not the 3D one!).
- Name your project something cool like "PixelRunner" or "JumpQuest."
- Hit "Create."

Boom! You're now in the Unity Editor.

Step 2: Understanding the Unity Layout

Unity can look a bit... intimidating at first. But once you know where everything lives, it gets easier—promise.

Here’s a quick rundown:

- Hierarchy: Lists all the GameObjects in your scene.
- Scene View: Your visual playground.
- Game View: What the player sees.
- Inspector: Shows properties of selected objects.
- Project: Where all your assets and files live.
- Console: Where Unity tells you what’s wrong (and right).

Think of Unity like your game-building toolbox. Nail down the essentials and the rest will fall into place.

Step 3: Your Player Character—Getting Things Moving!

Time for the fun part—let’s create a character that can actually move!

?️ Import Player Sprites

If you don’t have custom art yet, Unity’s Asset Store has tons of free characters. Or search online for free 2D sprite packs.

Once you’ve got your character:

- Drag the sprite into the "Assets" folder.
- Create a new GameObject in the Hierarchy: Right-click → 2D Object → Sprite.
- Assign your sprite to it.

⚙️ Add Physics

To make your player interact with the world, you’ll need some physics.

1. Select your player GameObject.
2. Go to the Inspector.
3. Click "Add Component" → Rigidbody 2D.
4. Set Gravity Scale to around 2 (helps with better jump feel).

Also, add a Capsule Collider 2D or Box Collider 2D for collision detection.

? The Movement Script

Now, let’s write a simple C

script to get your player moving.

Right-click in the Assets folder → "Create" → "C

Script" → name it "PlayerMovement."

Here’s a simple script:

csharp
using UnityEngine;
public class PlayerMovement : MonoBehaviour
{
    public float moveSpeed = 5f;
    public float jumpForce = 12f;
    private Rigidbody2D rb;
    private bool isGrounded;
    void Start()
    {
        rb = GetComponent();
    }
    void Update()
    {
        float move = Input.GetAxis("Horizontal");
        rb.velocity = new Vector2(move * moveSpeed, rb.velocity.y);
        if (Input.GetButtonDown("Jump") && isGrounded)
        {
            rb.velocity = new Vector2(rb.velocity.x, jumpForce);
        }
    }
    void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.contacts[0].normal.y > 0.5)
        {
            isGrounded = true;
        }
    }
    void OnCollisionExit2D(Collision2D collision)
    {
        isGrounded = false;
    }
}

Drag this script onto your player GameObject—and voilà! Your character can now run and jump.

Step 4: Building the World—Platforms and Physics

No point jumping if there’s nothing to land on, right?

? Add Ground and Platforms

- Right-click in the Hierarchy → 2D Object → Sprite → Rename it to "Ground."
- Scale it up and place it at the bottom of your scene.
- Add a Box Collider 2D.
- Don’t forget to set the Layer to "Ground" if you're layering physics later.

Want floating platforms? Do the same but place them higher.

? Tilemaps for Level Design

For larger levels, Unity’s Tilemap system is a game-changer.

- In the Hierarchy → Right-click → 2D Object → Tilemap → Rectangular.
- Unity creates a Grid and a Tilemap.
- Use the Tile Palette to paint tiles (like terrain pieces, walls, etc.).

This turns level building into a literal game of “painting” your world.

Step 5: Adding Enemies (Keep It Simple)

You don’t need a full-fledged AI system—start small.

- Create a simple enemy sprite.
- Add Rigidbody 2D and a Box Collider 2D.
- Write a script that lets it patrol between two points.

Example?

csharp
public class EnemyPatrol : MonoBehaviour
{
    public float speed = 2f;
    public Transform pointA;
    public Transform pointB;
    private Transform target;
    void Start()
    {
        target = pointB;
    }
    void Update()
    {
        transform.position = Vector2.MoveTowards(transform.position, target.position, speed * Time.deltaTime);
        if (Vector2.Distance(transform.position, target.position) < 0.1f)
        {
            target = target == pointA ? pointB : pointA;
        }
    }
}

Now you’ve got baddies guarding their turf… and players dodging like pros.

Step 6: Scoring and Checkpoints

Games need goals, right? Let’s add coins, scores, or checkpoints.

? Coins

- Create a coin sprite and add a trigger collider.
- Add a script to destroy the coin on collision and increment a score variable.

csharp
public class Coin : MonoBehaviour
{
    void OnTriggerEnter2D(Collider2D col)
    {
        if (col.tag == "Player")
        {
            GameManager.instance.AddScore(1);
            Destroy(gameObject);
        }
    }
}

? Checkpoints

You can create empty GameObjects as checkpoints. Store player position there and restart from it after dying.

Step 7: UI and Game Feel

Adding a UI makes your game feel more complete.

- Use Unity’s Canvas system to add a score counter.
- Add a restart button or game-over screen.
- Use particle effects when collecting coins or jumping.
- Add background music and sound effects—seriously, it’s a game-changer.

When players feel good playing your game, they’ll stick around. Juice it up!

Step 8: Building and Sharing Your Game

Once your game starts looking and feeling good, it’s time to share it!

?️ Build Settings

- Go to File → Build Settings.
- Choose your platform (PC/Mac, WebGL, Android, etc.).
- Hit "Build and Run."

Share it with friends or upload it to platforms like Itch.io—it’s free and takes just a few minutes.

Bonus Tips for New Developers

- ? Keep things small: Don’t try to build Hollow Knight overnight.
- ?‍? Comment your code. Trust me, future-you will thank you.
- ? Playtest often. You'll spot problems early and save hours.
- ? Join communities: Reddit, Discord, Unity forums—they’re goldmines.
- ? Keep learning. Unity has a massive library of tutorials and documentation.

Conclusion

Building your first 2D platformer in Unity is more than just lines of code and sprites. It’s a personal journey into game development—one filled with creativity, problem-solving, and loads of fun.

You’re not just making a game—you're crafting an experience. Every platform, every jump, every enemy, and every coin is a piece of the puzzle that brings joy to players.

So go ahead—open Unity, try things, break things, fix them, and make something you're proud of. Because this? This is just the beginning.

And hey, you’ve already taken the first leap.