Commission - my Cats

An online friend of mine liked a photo I took of my cats so much she commissioned me for a traditional art piece of it! It's the first big fine liner art I've done, the first ever in which I try to shade, but I'm really happy with how it turned out!
I made the cats pop out against the background a bit more and simplified the box Haru was standing on (it's a picture frame on top of a box of crafting supplies in the photo). I know the shadow behind her on the blanket could be more prominent but I feared that it everything would turn out too dark.