Excellent art! Love the animations and the small details like the swords on the ground. This could definitely sell in the asset store. Full marks from me!
As a big fan of parallax myself, I would recommend you hook it up to your camera position instead of your player position, and also make sure your layers consistently increase/decrease in brightness from front to back to sell the effect. Currently there are a few rocks that feel like they are the wrong distance away.
J is a good scale to keep the game at, you can zoom out to K if you ever have any big monuments you want the player to see.