Could be better
It's a neat little game you have but sadly there are a few problems.
But first the good things.
The instructions were easy to understand and simple.
The graphics weren't bad quality so no problems there.
But I noticed the bird moved very sluggishly, which is bad when the planes start coming in more than one at a time. Maybe give it a little more mobility.
The planes were a little but, on the first game an actual wall of them came which blocked any escape.
I don't know how many times I've said this before, but use background music. A tiny loop of music can make a good game a great game simply by giving it a little more life. It is hard to chose a good background music because you want it catchy without distracting people from the game, but if you find the right one the work was worth it.
Finally when I died there was no reset button. I clicked the bird and it took me to a blank screen.
All in all a game with potential but still not /quite/ up to the cut. Good job and I hpe my comments have helped in some way.