I really like the look of this game! And the movement of the pipe feels so smooth and good! How did you do it?
Other than that, the game is pretty addictive, but to me, it feels impossibly hard. The hopping bird requires way too much space for the opening to allow for the straight birds (or any other birds) to go through, resulting in me always moving the pipe away to cater for another bird, but then therefore dying to the hopping bird.
Maybe the distance between each bird has to be wider? Maybe the pipe opening should be bigger? I do enjoy this game but think it's too hard. I will give it more go's!