You dont have to be a photographer to be a critic.
No chip on my shoulder and I agree with you the water was a challange to create. I have often thought of adding rocks to the edge with water going arond them but that would pull your eye away from the barrel.
I'm not sure it belongs in this gallery tho. I'm not sure it can be classed as 'photography' as such. You've used photographs to creat a piece of art that isn't a photograph. I use digital processing to ehance/amend my photographs, but there is an undefined line between a retouched photograph and a work of art based around a photograph, but this defanatly crosses it.
I really like the pic, but I wouldn't call it a photograph as such. Perhaps this would be better in 'The Creative Corner'? I'll let the MODS decide