I am very grateful that you like this game so much! It's so touching when every time getting the feedback. That makes it worth I put into designing the game.
I think Cyber Hunter is a tough boss. Some players also think that this is more difficult than the final boss. Next game I will be designed more precisely by this these experience.
BTW, the next game is planned to be an original story and characters, although it might take more time to finish. Hope I can get your support again when the game is released! Thanks! I really appreciate it! :D