Yesterday I started to add more details (rain and lightning) and improving the parallax.
This slow down the game that why I worked on the backgrounds to improve the game performance I splitted the levels in areas that are enabled when the player goes inside (green ones) below.
Also I created an object to move to one place to another (to use for the doors) I draw a red line on the unity editor to check if goes to the right place.
On the image below you can see how the player moves between areas are enables/disable objects on the map.
Also I added the ability to "double jump" with somersault (you can see the unity animation.. I have to clean up it a little bit)
I will work now on keys to open the doors and some more details.. also the big boss of the first level.