update the example code

Author: CleanCut

README.md

@@ -68,6 +68,7 @@ Write your game!
  use rusty_engine::prelude::*;
 
  // Define a struct to hold custom data for your game (it can be a lot more complicated than this one!)
+ #[derive(Resource)]
  struct GameState {
      health: i32,
  }
@@ -78,7 +79,7 @@ Write your game!
      // Set up your game. `Game` exposes all of the methods and fields of `Engine`.
      let sprite = game.add_sprite("player", SpritePreset::RacingCarBlue);
      sprite.scale = 2.0;
-     game.audio_manager.play_music(MusicPreset::Classy8Bit, 1.0);
+     game.audio_manager.play_music(MusicPreset::Classy8Bit, 0.1);
      // Add one or more functions with logic for your game. When the game is run, the logic
      // functions will run in the order they were added.
      game.add_logic(game_logic);

src/lib.rs

@@ -14,6 +14,7 @@
 //! use rusty_engine::prelude::*;
 //!
 //! // Define a struct to hold custom data for your game (it can be a lot more complicated than this one!)
+//! #[derive(Resource)]
 //! struct GameState {
 //!     health: i32,
 //! }
@@ -24,7 +25,7 @@
 //!     // Set up your game. `Game` exposes all of the methods and fields of `Engine`.
 //!     let sprite = game.add_sprite("player", SpritePreset::RacingCarBlue);
 //!     sprite.scale = 2.0;
-//!     game.audio_manager.play_music(MusicPreset::Classy8Bit, 1.0);
+//!     game.audio_manager.play_music(MusicPreset::Classy8Bit, 0.1);
 //!     // Add one or more functions with logic for your game. When the game is run, the logic
 //!     // functions will run in the order they were added.
 //!     game.add_logic(game_logic);