Changing bridge layer logic to Bridge script instead of BasicCharacter. The Bridge was moved from GameLevel to TerrainManager because its more related to terrain.

Interactables/bellow_bridge_area.gd

@@ -0,0 +1,23 @@
+extends Area2D
+class_name BellowBridgeArea
+
+var is_character_bellow_bridge: bool = false
+var character_body: Node2D = null
+
+func _on_body_entered(_body: Node2D) -> void:
+	self._set_character_body_bellow_bridge(_body, true)
+
+func _on_body_exited(_body: Node2D) -> void:
+	self._set_character_body_bellow_bridge(_body, false)
+	
+func _set_character_body_bellow_bridge(_body: Node2D, _state: bool) -> void:
+	if _body is BaseCharacter:
+		self.is_character_bellow_bridge = _state
+		self.character_body = _body
+		print("bellow bridge: " + str(_state))
+
+func get_character_body_bellow_bridge() -> bool:
+	return self.is_character_bellow_bridge
+	
+func get_body() -> Node2D:
+	return self.character_body

Interactables/bellow_bridge_area.gd.uid

@@ -0,0 +1 @@
+uid://bg2dqq8ebhkjs

Interactables/bridge_area.gd

@@ -1,12 +0,0 @@
-extends Area2D
-class_name BridgeArea
-
-func _on_body_entered(_body: Node2D) -> void:
-	if _body is BaseCharacter:
-		_body.update_collision_layer_mask("in")
-		print("entered!")
-
-func _on_body_exited(_body: Node2D) -> void:
-	if _body is BaseCharacter:
-		_body.update_collision_layer_mask("out")
-		print("exited!")

Interactables/on_bridge_area.gd

@@ -0,0 +1,25 @@
+extends Area2D
+class_name BridgeArea
+
+var character_body: Node2D = null
+var is_character_on_bridge: bool = false
+
+func _on_body_entered(_body: Node2D) -> void:
+	#_body.update_collision_layer_mask("in")
+	self._set_character_body_on_bridge(_body, true)
+
+func _on_body_exited(_body: Node2D) -> void:
+	#_body.update_collision_layer_mask("out")
+	self._set_character_body_on_bridge(_body, false)
+
+func _set_character_body_on_bridge(_body: Node2D, _state: bool) -> void:
+	if _body is BaseCharacter:
+		self.character_body = _body
+		self.is_character_on_bridge = _state
+		print("on bridge: " + str(_state))
+
+func get_character_body_on_bridge() -> bool:
+	return self.is_character_on_bridge
+	
+func get_body() -> Node2D:
+	return self.character_body