Added hover stack to manage overlapping Area2Ds

Added room selector in demo scenes
Modified dialogues in room 1, fixed bug in room 8 and 9

game/rooms/room2/button/button.tscn

@@ -20,3 +20,6 @@ points = PoolVector2Array( 2.86993, 4.8189, 2.86993, 53.646, 50.8979, 53.9476, 5
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
 position = Vector2( 26.9811, 29.4218 )
 shape = SubResource( 1 )
+
+[node name="dialog_position" type="Position2D" parent="."]
+position = Vector2( 22.0044, -141.187 )