The endless runners genre remains one of the most popular in the mobile segment due to its simplicity and high involvement. Creating such a game on the platform Android opens access to a billion-strong audience of users, but requires a clear understanding of technical processes. The developer needs to not only draw a character, but also tune the physics engine, optimize performance for different screens and implement player retention systems.
The development process begins long before the first line of code is written and includes choosing tools, level design and testing on real devices. In this article we will analyze in detail all the stages of creating a high-quality runner, avoiding abstract theories and focusing on practical steps. The finished product It should not only work without failures, but also offer a unique gaming experience in a highly competitive environment.
Selecting a game engine and preparing the environment
The first and most critical step is choosing the software on which your game will be built. For mobile platforms, cross-platform engines have become the de facto standard, allowing you to export a project directly to APK or AABformat. The most powerful solution is considered Unity, which offers a huge library of assets and language support C#. The alternative is Godot Engine, known for its lightweight and open source code, which is ideal for indie developers with a limited budget.
After installing the engine, you need to configure the development environment to work with Android SDK. This involves installing the Java Development Kit (JDK) specific version compatible with your development environment and setting environment variables. Errors at this stage often lead to the inability to build the project or connect a real device for debugging. Make sure that the engine settings indicate the correct path to the Android SDK and that the necessary platforms are installed through the package manager.
It is also important to decide on the screen orientation and resolution. For runners, portrait mode is most often chosen, as it is convenient for playing with one hand, but landscape orientation gives more space for working out background details. Interface adaptability must be set up immediately so that the controls are displayed correctly on both compact smartphones and high-resolution tablets.
⚠️ Attention: Android SDK versions and build tools are updated regularly. The settings interface in Unity or Godot may differ from the screenshots in old tutorials, so always check the official documentation of the engine before setting up the project.
Designing a game mechanics and physics
The heart of any runner is the mechanics of movement and obstacles. Unlike complex RPGs, responsive controls are important here: pressing the screen should be instantly transmitted to the character. Implementing jumps, sliding under obstacles, or double jumps requires fine tuning of physical parameters. In engines like Unity for this, components are used Rigidbody2D and Collider2D, which are responsible for gravity and collisions of objects.
It is necessary to provide a level generation system. Static levels quickly become boring, which is why endless runners use procedural generation. The script should randomly select obstacle prefabs and place them on the player's path, following the logic of passability. Difficulty algorithm should gradually increase the speed of the game or the frequency of obstacles as points accumulate, in order to maintain the user's interest.
Special attention should be paid to the collision system. Colliding with an enemy should lead to a loss or loss of life, and collecting bonuses should lead to an increase in score. It is important to set up collision layers (Layer Collision Matrix) so that the character does not get stuck in the background decorations or fall through platforms due to errors in hitbox calculations. Fine-tuning these settings will prevent players from feeling unfair when they lose.
Use “debug boxes” (Gizmos) to render hitboxes during development. This will help you see the real boundaries of collisions, which may not coincide with the visible graphics of the sprite.
Creating graphics and character animation
The visual component of the runner directly affects the user's first impression. The graphics can be made in the style of pixel art, 2D vector art, or even a low polygonal 3D model. The main requirement is the readability of silhouettes. The player must instantly distinguish a safe platform from spikes or an enemy, even on a small smartphone screen with low brightness.
Animation of character movement requires smoothness. 2D games use frame-by-frame animation or skeletal animation through tools like Spine or built-in engine tools. The running cycle should be seamless, and transitions between states (running, jumping, falling, death) should occur without delay. Sprite optimization critical: the use of texture atlases allows you to reduce the number of draw calls, which significantly increases FPS on weak devices.
Don't forget about visual effects (VFX). Dust particles as you run, sparks as you collect coins, or time slowdown effects add juiciness to the game. However, an overabundance of effects can overload the processor of a mobile device. The balance between beauty and performance is achieved by limiting the number of active particles and using simple shaders.
| Asset type | Recommended format | Optimization | Impact on memory |
|---|---|---|---|
| Textures character | PNG (lossless compression) | Sprite atlases | High |
| Background images | JPG (lossy compression) | Low resolution for long shots | Medium |
| Sound effects | OGG / WAV | Mono for short sounds | Low |
| Music | OGG | Streaming from disk | Minimal |
Programming logic and state management
The architecture of the game code should be modular and understandable. Using the Finite State Machine pattern is ideal for controlling player behavior. A character can be in the following states: Idle (inaction), Run (running), Jump (jumping), Dead (death). Switching between these states must be strictly regulated to avoid bugs where the player can jump while falling or die twice.
Input Management on Android has its own characteristics. It is necessary to process screen touches (Touch), swipes and clicks of physical buttons, if any. For runners, one action is often enough - tapping on any part of the screen to jump. However, it is worth implementing protection against accidental clicks in the menu or when calling system curtains. The input processing code should be placed in a separate module for easy replacement in the future.
The progress saving system is mandatory. Players want to see their record and the amount of collected currency even after closing the application. In Android, this mechanism is used SharedPreferences for simple data or a local database SQLite / PlayerPrefs in Unity for more complex structures. Backup it is important to provide data in case of reinstalling the game or changing the device.
☑️ Checking the game logic
Integration of sound and user interface
Sound creates an atmosphere and gives feedback on the player’s actions. The sound of jumping, collecting a coin or hitting should be clear and pleasant. The music track should loop without audible breaks and dynamically change tempo or intensity depending on the situation (for example, speed up when the game speed increases). Using the sound mixer allows you to separately adjust the volume of effects and music in the settings.
The user interface (UI) in runners should be minimalistic so as not to block the view of the playing field. The score counter, pause button and life indicator are usually located at the edges of the screen. Fonts should be large and contrasting. When creating a navigation menu, make sure that the buttons are large enough to be clicked with a finger, following the recommendations Material Design for the minimum size of the clickable area (48x48 dp).
Interface localization is an important step for a global release. The texts of buttons, error messages and descriptions should be placed in separate resource files. This will make it easy to add support for English, Chinese, Spanish and other languages without rewriting the code. Adaptive UI Should correctly display texts of different lengths without breaking the layout of buttons on different devices.
⚠️ Attention: Do not use the default system fonts, as they may differ on different smartphone models. Include your own font files in the project to ensure a consistent visual style across all Android devices.
Optimization, testing and publishing
The final stage before release is thorough optimization. Mobile devices have limited battery and memory resources. It is necessary to test the game on devices with different characteristics: from flagships to budget models. Profiling tools in the engine will help you find bottlenecks: memory leaks, excessive CPU usage or GPU overheating. Reducing shadow resolution, disabling anti-aliasing on weak devices and unloading unused assets are standard procedures.
Testing should include testing on real devices, and not just in the emulator. Emulators often incorrectly reproduce the operation of the touchscreen, gyroscope and battery consumption. Pay special attention to interrupt handling: what happens if the user receives a call or notification while playing? The game should be paused correctly and resumed without failures. Crash reports It is advisable to connect via services like Firebase Crashlytics to track errors from real users.
For publication in Google Play Console, you need to prepare_store listing_: icon, screenshots, promotional video and description. The game must be signed with a developer key (Keystore), which must be stored in a safe place, since its loss will make it impossible to update the application in the future. The publication format now requires the use of Android App Bundle (.aab) instead of the outdated one APK to optimize the download size for each specific device.
What is Keystore and why should you not lose it?
Keystore is a digital certificate that confirms your authorship of the application. Google Play requires that all app updates be signed with the same key as the original. If you lose the keystore file and its password, you will forever lose the ability to update your app in the store and will have to publish it as a completely new product from scratch, losing all old users and reviews.
Publishing in Android App Bundle (.aab) format allows Google Play to automatically generate optimized APKs for each user's device type, reducing download size and saving space on the player's smartphone.
Frequently asked questions (FAQ)
Do you need to know programming to make a runner?
To create a full-fledged game, knowledge of the basics of programming (C#, GDScript or Java) is necessary to implement logic, physics and data saving. However, there are visual designers (for example, Construct 3 or Bolt for Unity) that allow you to create simple mechanics without writing code, using a block logic system.
How long does it take to develop a simple runner?
Creating a prototype (MVP) with basic mechanics can take from 2 to 5 days for an experienced developer. A full-fledged game with graphics, sound, menus, monetization and debugging usually requires from 1 to 3 months of work alone, depending on the complexity of the graphics and the number of levels.
How to make money on a runner?
Main monetization models: advertising (banners, videos for a reward), in-game purchases (skins, currency, disabling advertising) or paid game version. The most popular is a hybrid model that combines advertising and microtransactions.
Is it possible to make a runner entirely on a phone?
Technically, this is possible using mobile IDEs such as AIDE or specialized applications for creating games, but the process will be extremely inconvenient and limited. For serious development, it is highly recommended to use a PC or laptop.
What are the minimum Android requirements for my game?
It is recommended to target Android 5.0 (API level 21) and higher, as this covers the vast majority of active devices. Setting the minimum version too high (for example, Android 10+) will sharply reduce your potential audience.