flame/doc/structure.md

Structure

The only structure you are required to comply is having an assets folder with two sub folders: audio and images.

An example:

  Flame.audio.play('explosion.mp3');

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

The file structure would have to 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. Be mindful of configuring the prefix property correctly if you are changing this structure.

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