WeeoWeeo:
You are okay with the head and floor, but here are some pointers
I suggest you to use references to draw manga.
the head is a sphere and a plane, not a single sphere, also the head is also big compared to the body.
All eyes in every style of art has a pupil, you didnt do it.
Hair isnt like manga, try to copy some references.
it is abstract, I think you made the simplicity fine.
Copy more from reference and you will get better.