Beat this one. It was a nice, cute little game. I love the art style and I also love that you can divide the bird into smaller ones (like in LocoRoco, W). I like the sound effects and the music as well. The level design overall is pretty good and the game is fun. Some parts were a bit confusing so having indicators would be nice for newbies.
One thing, I think that when the bird hits a spike, only the bird that hit the spike should be reset, not both, as it's kind of annoying to do it all over again with the other bird as well. Also maybe consider making the death have more visual flair so it's clearer.