Menus, Sound & Polish
The Threshold
Lesson 1
YOU DIED
Build: The death screen: a full-screen fade triggered by GameEvents.player_died

Lesson 2
The Pause Menu
Build: PROCESS_MODE_ALWAYS, Esc toggles get_tree().paused, Resume / Menu / Quit

Lesson 3
Regenerate The Floor
Build: reload_current_scene, the dungeon_generator group gate, and the Main Menu jump

Lesson 4
The Main Menu
Build: The boot scene: Start resets the run and loads the dungeon; set run/main_scene

Lesson 5
The Full SoundManager
Build: A pooled AudioStreamPlayer bank with pitch variation and voice-stealing

Lesson 6
The Cursor Manager
Build: An app-wide themed cursor via Input.set_custom_mouse_cursor

Lesson 7
The Lock-On Reticle
Build: A ring that tracks the lock-on target via unproject_position, guarded end to end

Lesson 8
Final Assembly
Build: Verify the autoload order and main scene, then play the whole boot-to-quit loop
