Effort: 2/2 - Yep, enough was done here.
Look: 2.5/3 - Agreed with muffins. One way to help really dark background is to toss an Exposure Adjustment layer on the top, set it to 0 exposure, offset at 0.0165, and gamma to 0.89.
Creativity: 1/1 - Yessir.
Total: 5.5/6
Final: 6/6