The Megaman Battle Network series is one of my all-time favorites, so of course I absolutely loved this game! Definitely a very hard game, but I enjoy the way that it ramps up the difficulty in a steady way that would feel very rewarding if I had more time to really sit down with it and beat it! Maybe once I'm done with finals? ;)
I also really love the boss design as well, it really keeps the game fresh and interesting considering the fact that a "one boss boss-rush" as a concept has a high risk of becoming either repetitive or too short. Even though gathering the glowing tiles technically makes him more difficult to beat (which as a player I should be conditioned not to do), I honestly didn't even mind because I was always excited to see what new attack would get thrown at me next. Really fun game!!