This is super satisfying. Once I got to butterfly, I thought the movement speed was changing randomly. Once I understood that it was responding to my direction, movement itself just became a joy. I had so much fun zipping around, diving to gain speed just for the sake of it. For 48 hours, it feels very impressive to me.
The idea to zoom out as you get faster is great. A lot of games in general don't do this, so the player just runs into things constantly. The birds were also very cute! Really strong work!