Chapter 12: Audio and a State Machine for Menus, Gameplay, and Pause

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Technical requirements

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Sound: looping music

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How Ebitengine handles audio

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The audio manager

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Loading the sounds

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Where the music plays

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What is a state machine, and why games use it

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Understanding the state machine

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The four states

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The level-up panel stays inside Game

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Decoupling the core from the game package

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The State and StateMachine types

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The State interface

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IDs, registration, and switching

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Quitting the process

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App: the single ebiten.Game

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Run and window setup

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Shared menu helpers

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The main menu state

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The game state: delegating to Game

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The pause state

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The options state

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The pause action and IsPausePressed

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The main package

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Transition diagram

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Summary

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Chapter 11: Weapon Unlock and Gated Upgrades

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Chapter 13: Game Feel, Particles and Visual Effects