Cool drawing, good concept.
Although im personally not feeling the overall colors. i fell like if you make another background it will sett the overall mood i the painting. and the overall look of it.
or try too mix the colors a bit different.
im a bit focused on the spheres\bubbles in the background.
some places the linework is too dark. you cant see the edge f the coat on the shoulder, and the overall reflective lighning is to me wrong when looking at the background.
sorry for the long critique but it said 100 words minimum so..
Keep it up