Try to find a real bird, and un-squish the car. Might want to add shadows to the arches you made, too...

The white lines are crooked and sloppy looking, and the "roads" are not even in width proportion.

Cute concept, but the execution of it needs work.

Thanks for your comments. I made some changes.

cute.......improve the water at the edges of the pillars

I see a reflection in the water of the seagull, but I don't think that that should be visible... the shadows are too big, the road is too deformed and the arches need some improvement.

just spotted, the nearest pillar's perspective should be the same as the one behind

Cool adding the birds to the picture.