To build a simple game in Unity, start with one small playable loop: steer a ship, avoid obstacles, earn points while you survive, and restart after a collision. Unity Learn’s Sprite Flight course uses this 2D arcade structure and is labeled for Unity 6.3. This guide follows the same scope, explaining the pieces to build and what to check as you go; it is not a complete C# code listing.
What you will build
Your first game should answer four questions: What does the player do? What gets in the way? How does the player know they are doing well? What happens when they lose? For this project, the player steers a small triangular ship, avoids flying obstacles, earns a score over time, and can restart after a collision.
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Keep the first playable version to those essentials. A finished loop is more useful than a larger project with unfinished menus, levels, or art. Unity Learn’s Sprite Flight course follows this survival-and-scoring format and lists a web publishing exercise at the end. [Unity Learn: Sprite Flight]
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Set up Unity and create a 2D project
Use instructions that match your installed Editor version. Sprite Flight is labeled for Unity 6.3. Unity’s Unity 6.0 setup tutorial, by contrast, describes installing Unity 6 through Unity Hub and creating a project with Editor 6.000 LTS using the Universal 2D template. If you follow a different version or tutorial, expect some labels and menus to differ. [Sprite Flight; Unity 6.0 setup tutorial]
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- Install and open Unity Hub, then install the Editor version required by the course or project you choose.
- In Unity Hub, create a new 2D project. If you are following Unity’s 6.0 setup tutorial, choose the Universal 2D template.
- Open the project and save the scene you will use for the game. A scene is the workspace that holds the objects, camera, and other elements for a level or screen.
The Sprite Flight course starts from a blank project and has learners make the simple ship and gameplay themselves, so you do not need to find art assets before beginning. [Unity Learn: Sprite Flight]
Build the scene, camera, and ship
Unity scenes are made from GameObjects, which represent things in the scene, and components, which give those things properties or behavior. A camera is a GameObject with a camera component; it determines what the player sees. A ship can be a simple shape with a script component that controls its movement. Unity’s basic 2D learning unit introduces scene building, camera setup, GameObjects, components, physics, scripting, and UI. [Unity Learn: 2D unit]
- Set up the camera so the visible play area is clear and the ship has room to move.
- Create a simple triangular ship shape. For a first pass, prioritize a visible player object over detailed artwork.
- Add the player-control behavior as a script component. A script is code that tells an object what to do; in this game it will respond to a click or tap.
- Enter Play mode to check that the ship is visible in the camera view before adding obstacles.
Create a reusable obstacle
Make one obstacle first, then turn it into a prefab. A prefab is a reusable configured GameObject: you can create multiple instances from it without rebuilding the object each time. This is useful for a game where obstacles repeat. Sprite Flight includes an obstacle-prefab step and varies obstacle size, direction, and speed. [Unity Learn: Sprite Flight]
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- Give it the components or script behavior needed to move through the scene.
- Save the configured object as a prefab, then use instances of that prefab for repeated obstacles.
- Test one obstacle before introducing variation. Once it works, adjust size, direction, or speed to make later passes less predictable.
Add steering and test the feel
For this small arcade loop, use a simple mouse-click or mobile-tap interaction, as Sprite Flight does. The ship should respond clearly and predictably; add complexity only if the basic control is working.
- Implement the click-or-tap response in the player script.
- Enter Play mode and click or tap to steer the ship.
- Check that the ship stays within the camera’s visible play area and that the control feels responsive enough to avoid obstacles.
If an input does not work, verify that the game is actually running in Play mode and that the expected input is being sent to the game window or device. Check the script and its attachment to the player object before adding more behavior.
Detect collisions and add a score
Collision detection gives the obstacle a consequence: when the ship hits one, the run ends. Unity’s 2D physics components provide a way to detect interactions between objects, while a script can decide what to do when contact occurs. Keep the first collision rule simple rather than building a detailed physics simulation. [Unity Learn: 2D unit]
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- Set up the ship and obstacle with the appropriate 2D collision and physics components for the interaction you want.
- Add behavior so contact between them ends the current run.
- Test by steering into an obstacle and confirm that the game recognizes the hit.
- Add a UI text element for the score and update it while the player survives. The score gives the player a concrete measure of progress.
If a collision is not detected, check that both objects have the expected 2D components and that the collision behavior is attached to the correct object. If the score does not change, verify that the score-update behavior runs during play and that the UI element is assigned to it.
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Make the game restartable
A restart turns a one-shot test into a game you can replay. Add a clear way to start a new run after a collision, following the restart step in Sprite Flight. Keep the restart behavior separate from optional effects so you can test it reliably. [Unity Learn: Sprite Flight]
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- Choose how the player will trigger a restart after losing.
- Reset the state that changes during a run, including the player position and score, and return obstacles to their starting behavior.
- Play, collide, restart, and confirm that a fresh run begins correctly.
Polish only after the core loop works
Once steering, obstacles, collisions, scoring, and restarting all work, add optional improvements such as particles, audio, or a collision effect. Unity’s 2D learning material covers UI and particles, and Sprite Flight includes bonus features; neither is needed to prove the game loop. [Unity Learn: 2D unit; Sprite Flight]
Build and share the game
Sprite Flight concludes with an exercise to build and publish to the web. Treat publishing as a separate step after the game works in the Editor: select the target platform, follow the current platform-specific requirements, then test the resulting build. The course listing confirms a web publishing exercise, but it does not establish all current platform prerequisites. [Unity Learn: Sprite Flight]
Choose a learning route that fits your starting point
If you need help getting comfortable with the Editor before making a game, Unity Essentials is Unity’s guided beginner pathway and covers Editor basics, 2D and 3D fundamentals, audio, scripting, and publishing. Unity also recommends Roll-a-Ball, Sprite Flight, and Create with Code as learning options. [Unity Learn collections]
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For a more structured 2D project, Unity Learn’s Create a 2D game collection, last updated August 4, 2026, lists three different courses. Their durations are Unity’s estimates for each course, not promises of an individual learner’s completion time. [Unity Learn: Create a 2D game collection]
| Course | Listed duration | What it offers |
|---|---|---|
| Sprite Flight | 4 hours 30 minutes | 2D survival-and-scoring arcade game; includes a web publishing exercise. [Unity Learn course page] |
| 2D Adventure Game: Robot Repair | 12 hours 50 minutes | A longer 2D adventure-game project. [Unity Learn collection] |
| Create a 2D Roguelike Game | 2 hours 30 minutes | A shorter project in the roguelike genre. [Unity Learn collection] |
These are distinct projects, not interchangeable versions of one tutorial. Choose by genre, scope, and whether you want to finish with a playable game or a publishing exercise. Unity Playground is a separate no-code option for 2D physics-based games; its page identifies version 2022.2, so it is an alternative for visual makers or educators seeking no-code learning rather than a Unity 6.3 workflow. [Unity Playground]
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