The flow is going the right way and tbh the lighting shouldn't be behind him but on the left front of him hehe. as you can see at his hair the light is coming from that way. unless you made it like that. THe lighting should always be at the opposite direction of the shadows. but that's just common sense hehe xD

Good job anways and yes i agree, those bubbles aren't really working. I personally ALWAYS set Bubbles to Either Lighten or Screen.