I'm sad you couldn't finish the game because it's really chill and beautiful game. You managed to make flying with all the details on the ground is a really cool feeling.
White UI was a bit hard to read too but it's the kind of game where you want it to be as discreet as possible. Maybe having absolutely no UI and just having some kind of button to display some king of sensor toward southwest would have made more sense or using the shadow of other geese groups appearing some time. Displaying some kind of text when you have not enough geese to unlock the next biome could work too.
Nice work, I hope you'll finish it !