A feature-rich Flappy Bird clone built in Unity 2D, supporting solo and local co-op (duo) play with multiple difficulty modes, a leaderboard, and custom sound effects.
- Solo Mode — classic single-player Flappy Bird gameplay
- Duo Mode — local two-player co-op on the same keyboard; the player who survives longer wins
- Four Difficulty Levels — Easy, Hard, Extreme, and ExtremeExtreme, each tuning gravity, bird flap strength, pipe speed, and spawn rate
- Persistent High Scores — per-difficulty high scores saved locally via Unity
PlayerPrefs - "New Best" Notification — visual + audio feedback when the player beats their personal best
- Scrolling Background — parallax background scrolling for visual depth
- Custom Cursor — custom in-game cursor sprite
- Full Sound Design — background music, flap sounds, death sounds, and win fanfare
| Scene | Purpose |
|---|---|
StartScene |
Main menu |
PlayerModeScene |
Choose Solo or Duo mode |
DifficultiesScene |
Choose difficulty (Easy / Hard / Extreme / ExtremeExtreme) |
SoloScene |
Single-player gameplay |
DuoScene |
Two-player local co-op gameplay |
| Key | Action |
|---|---|
W |
Flap up |
A |
Push left |
D |
Push right |
Space |
Restart after game over |
Player 1 uses the same keys as Solo Mode. Player 2 controls are configured separately in-scene.
Assets/
Font/ — Custom fonts (ThaleahFat)
Image/ — Sprites, backgrounds, UI, prefabs (pipes, weapons, cursor)
Scenes/ — All Unity scenes
Script/ — All C# game scripts
Sound/ — In-game sound effects (WAV)
Packages/ — Unity package manifest
ProjectSettings/ — Unity project configuration
music/ — Source audio files (MP3)
png/ — Source image assets
| Script | Responsibility |
|---|---|
BirdScript.cs |
Player 1 bird physics, input, collision, death |
BirdScript2.cs |
Player 2 bird (Duo mode) |
LogicScript.cs |
Score tracking, game-over logic, win/draw detection |
ScenesManager.cs |
Scene transitions, mode/difficulty state management |
PipeSpawnScript.cs |
Procedural pipe spawning |
PipeMoveScript.cs |
Pipe movement and speed |
PipeMiddleScript.cs |
Score trigger (middle gap detection) |
HighScoreScript.cs |
Per-difficulty high score persistence |
BackgroundScrollerScript.cs |
Parallax background scrolling |
BackgroundMusicScript.cs |
Background music management |
- Unity 2021.3.21f1 (LTS)
- Unity 2D module (included by default)
- Clone the repository:
git clone https://github.com/<your-username>/flappy-bird.git
- Open Unity Hub and click Add project from disk, selecting the cloned folder.
- Open the project in Unity 2021.3.21f1.
- In the Project window, open
Assets/Scenes/StartScene.unity. - Press Play to run the game in the editor.
- Go to File > Build Settings.
- Add all scenes from
Assets/Scenes/in the listed order (StartScene first). - Select your target platform (PC, Mac, WebGL, etc.) and click Build.
| Difficulty | Gravity | Flap Strength | Pipe Speed | Spawn Rate |
|---|---|---|---|---|
| Easy | 5 | 20 | 7 | 3 s |
| Hard | 5 | 21 | 13 | 1.7 s |
| Extreme | 7 | 28 | 19 | 1.3 s |
| ExtremeExtreme | 5 | 28 | 19 | 1.3 s |
- Game Engine: Unity 2021.3 LTS
- Font: ThaleahFat
- UI Assets: 2D Casual UI pack
- Background Art: Pixel Skies 1920×1080 (Full HD)
- Sound Effects: DM Casual Game Sounds pack
This project is for personal use. Third-party assets (fonts, UI packs, sound packs, background art) are subject to their respective licenses.