I love your aesthetic so much. The post processing on the landscape is awesome. I also love the guitar riff when you flap your wings, I guess I should have expected that based on the name lol.
I played it a couple of times and I never found any insects, so I don't know if I wasn't looking in the right spot or what. But I think it may be helpful to highlight the insects quite a bit that way it's very clear where they are. I also think that your game really shines when you're closer to the ground. The landscape is well designed and fun to fly around and along with the shader it just feels really good, so I think it would be nice to start the level out closer to the ground or maybe even in some of the woods you've got setup.
I also really like your wind effect, but I do have a small suggestion with that as well. Since you're using UE, I would get the rotation of the wind effect at begin play to just be the way it's going to be in the game and then on every event tick reset the rotation to be the way it is initially. Then when the bird is flying in a certain range of similar rotation it will get the speed boost from the wind, that way it's super clear how to get the boost from the wind as well.
All in all, very cool. I can't wait to play it again next week!