Audio manager implementation

scripts/player/player.gd

@@ -94,6 +94,7 @@ func _handle_shooting(delta: float) -> void:
 		_shoot_timer = 1.0 / stats.fire_rate
 
 func _fire(direction: Vector2) -> void:
+	AudioManager.play("player_shoot")
 	# Overclock: every 3rd shot deals 0 damage
 	var is_zeroed_shot := false
 	if stats.overclock:
@@ -201,6 +202,7 @@ func take_damage(amount: float) -> void:
 
 	stats.current_health -= actual
 	_iframe_timer = IFRAME_DURATION
+	AudioManager.play("player_hit")
 	EventBus.player_health_changed.emit(stats.current_health, stats.max_health)
 
 	# Reactive effects on taking damage

scripts/player/projectile.gd

@@ -76,6 +76,7 @@ func _on_body_entered(body: Node) -> void:
 # Explosive — AoE damage to all enemies in radius
 # ---------------------------------------------------------------------------
 func _explode() -> void:
+	AudioManager.play("explosion")
 	var space  := get_world_2d().direct_space_state
 	var query  := PhysicsShapeQueryParameters2D.new()
 	var circle := CircleShape2D.new()