I like the boss rush idea and you got quite a lot done for only a month. The difficulty definitely ramps up really quickly throughout the fight which caught me off guard but ultimately did make the game feel better. The only feedback I would give is that the UI elements are a bit small and may have been better to put at the top of the screen rather than the bottom. Not a major thing, I just think it was more important to see what was happening on the ground than in the air and so it feels like the UI would be less crowded at the top. But otherwise really great job!