Last complaint 
The bricks you can see through the cracks in the wall are too small.
If you want to see more than one brick through a crack of this size, you have the enlarge the bricks and the cracks. It's not a major issue, but I noticed it and so will the player.
Nevertheless, this is a nice background now. Also you now have many objects the player can click on to explore the enviroment. I really like this bg now.

The bricks you can see through the cracks in the wall are too small.
If you want to see more than one brick through a crack of this size, you have the enlarge the bricks and the cracks. It's not a major issue, but I noticed it and so will the player.
Nevertheless, this is a nice background now. Also you now have many objects the player can click on to explore the enviroment. I really like this bg now.