flame/doc/structure.md

Structure

Flame has a proposed structure for your project that includes the standard Flutter assets directory in addition to two children: audio and images.

If using the following example code:

  FlameAudio.play('explosion.mp3');

  Flame.images.load('player.png');
  Flame.images.load('enemy.png');

The file structure Flame would expect to find the files in would be:

.
└── assets
    ├── audio
    │   └── explosion.mp3
    └── images
        ├── enemy.png
        └── player.png

Optionally you can split your audio folder into two subfolders, one for music and one for sfx.

Don't forget to add these files to your pubspec.yaml file:

flutter:
  assets:
    - assets/audio/explosion.mp3
    - assets/images/player.png
    - assets/images/enemy.png

If you want to change this structure, this is possible by using the prefix parameter and creating your own instances of AssetsCache, ImagesCache, AudioCache and SoundPools, instead of using the global ones provided by Flame.