I like html games, no need to download ^^
I've played many musical games, and your concept is good and different, I like that. Visuals are good too, the different layers of the background are beautiful and the birds are cute.
It is challenging to play with keyboard arrows, which was my first choice. The problem is that the birds won't go back to an horizontal fly after pressing up and down, and it makes it quite harder than the left mouse click. Both gameplays are different and interesting however, and it's cool to have the choice!
Is there no screenshot of the original game?