Update: It doesn't post scores to the Game Center, even tho I'm signed in when I play. This is rather infuriating. I don't want to send a Tweet. I'd just like to get my score on the Leaderboard. Granted, the Game Center is pretty silly & juvenile, but if the developers insist on including it, they should make sure it works.
Original review (4 star then) This is a good one. Nice UI & sound effects. The speed is enough challenge without feeling impossible. Very cute graphics, and easy to listen to sound effects.
It would be a good game for elementary school kids, as it isn't too, too fast, and rewards patience, persistence, and close observation.
I've been playing on an iPad Mini, so the game will be a bit different at different scale of reg iPad/iPhone. The ads between rounds are a bit obtrusive. Also, the response time to taps is a bit slow &/or sensitive, so as you get rushed and tend to tap harder, the birds pop a bit slowly. Because of this issue, I gave only 4 stars.