Congrats on your first game! I like what you chose for controls (jump and action), and also bird switching is really good - could become a really cute puzzle game.
I got stuck at the following spot, tried several jum&crush or fly above, and even switching mid-air. For the yellow bird, I would say you could keep some forward movement on rolling in the air - just feels strange that it just fell down.
But anyway, good job! You have your style ;)