This was fun! I ended up pulling out a joystick to play with and sated my hunger for blood and becoming the GREATEST GULL THAT EVER WAS.
I found myself wishing that I could hold Shift to bank and pitch a little faster, and I would have liked to have been able to grow just a little more massive before the end. I got a bit of a stutter/freeze when new regions were being added, but otherwise thought it was a pretty smooth experience.
I hope that you had a positive experience with Godot, and thanks for doing a Linux build! :)