Environment Background for 2D Platformer Game

This is one of my works for my first sem final project which i created a underground abandoned bunker for my pixel art platformer game

this is a scarpbook as my art references

this is a initial sketch for the scene to determine the layout

Stage 1 which a begin with a basic background image

Stage 2 which i add extra objects to the background to create a more unique scene

Stage three which i add in more details and textures to highlight the initial background

Final Stage which i add in tile sets to complete the scene