I think this is a nice use of the theme! I found eating the dogs to be pretty funny!
I think the realistic shadow under the seagull made it a bit difficult to work out exactly where I was until I was right down low to the ground. A less realistic shadow directly under might help give a better sense of position and make it easier to pull off more satisfying swoops. I found myself dropping a lot just to get a better sense of position!
The only other issue I had was the choice of Alt in the controls which was getting my browser to open up it's menu! If you could get in an alternative that would solve that issue for me nicely!
Good work so far!