I liked the concept. Here is what I felt with 100% seriousness. The player is hard to control (meaning going left and right feels hard). Birds are too much. And i found going straight up is easier than going left and right.
My suggestions : 1) Add the loading Screen as I restarted the game like 5 times cause it was blackscreen. Adding highscore meter would be great too.
And more importantly The concept of this game was very unique and fits the theme well. Music was great too. :) I liked it