I really enjoyed this game! I thought the art and style were really great, and I thought about this game for several days after I played it the first time, where I had been thwarted in the dream level. I'm glad I came back to it and finished it today. It was really a nice little gem to find the in the jam. It was pleasantly difficult for a platformer. Whenever I found a new bird doing some new behaviour, it felt like you were gently guiding me to figure out a new skill, like crouching or moving back and forth while hovering. I think from a game design perspective, that was really well done.
The only minor constructive criticism I would give is that the text below the game never faded to actual transparency for me. I could always still see the last line of text in between scenes. Otherwise, the only other thing I wanted was more! I wanted to see more of the Victorian times in this cute pixel style and maybe explore a few more levels. Anyways, good job!