Thanks for your feedback! We are glad that you enjoyed the game. The boss HP as the difficulty is something hard to balance because us, as developers, are really good at our game. Definitively, its something to improve.
Yes!! I call it the Programmer Curse. You repeat and practice against the same boss over and over and over. Not only that, you know every safe frame, safe spot, best strategies, how to maximize your damage, time to punish. That's why I have a philosophy, if it is a walk in the park for me, it's hard for other players haha! Always good to have feedback from other people during the earlier builds. But nonetheless, you guys did a phenomenal work. It still is joyful experience and feels balanced as the bosses are very well executed.