Adorable, simple, fun. I have a few nitpicks with gameplay and balance. The concept of birds/planes draining the bar, and which can be shot with the gun, was not obvious, though I did end up figuring it out. The gun is also totally pointless, as the bullets move far too slowly to make shooting birds worth it. I noticed also that the player can stick to the left side of the map and fly infinitely, as, there is candy but never any planes.
Good interpretation of the theme, and I would have loved if the propeller hat actually spun. Nice job overall.
EDIT: Completely my fault for not reading about the birds on the game page