Not bad! If you make the tail only a half shank long, it will be more horizontal and this will allow the wing to sit closer to the body for a better looking and more fishable fly. Also, the crests in the wing should go from short on the bottom (no longer than the base of the tail) to the longest one on top (even with the end of the tail). These changes will make a world of difference in how the fly looks and how it fishes.
By the way, I fish crest (or topping) wing flies in bright sun during the summer. One of my favorite low water summer flies for use in mid-day is Kelson's Variegated Sun Fly tied in the red variation.
Hook: size 8 to 12 standard or low-water
Tag: fine oval silver
Tail: golden pheasant crest (topping) and Indian Crow
Body: black, red, and yellow single strand yarn tied side by side
and spiraled side by side up the body in a cigar shape.
Hackle: black only at shoulder
Wing: golden pheasant crest feathers (toppings) 4 to 6 of them
depending on the hook size.
Head: black, small