The background is very nice but you still have to make the forms of their bodies more clear.Dont change it now, just keep in mind that the viewer love to understand the how to say it "3d of the form". Thats why sometimes we love seeing even simple cubes
Its good in overall but push your skills further
Her "(dunno word )" looks strange(near the pelvis area after the boom!!!)
Keep studying and understanding everything around you pal!!!