I'm genuinely stunned at the level of production quality here, this feel of melancholic sci-fi very much felt akin to 1000xRESIST which is one of my favorite games in recent memory, so I was just hooked on the atmosphere from the get go. The boss' attacks are all very dynamic and the dodge definitely feels powerful enough to deal with the speed of his attacks. I did find the volume of health he had to be unnecessarily long to the point where I felt like I was just going through the motions past the halfway point, but the fact that I did beat him by the end does show that this game has enough safety nets for longer fights to be viable which is a very good thing. I also feel like the feedback for hitting and getting hit is too flat considering the incredibly impressive artwork and sound design, but in a jam there's just so much you can add in terms of game feel so I definitely get why you didn't have enough time to do all that.
I sincerely hope you continue to work on this project, because I absolutely adore this genre of sci-fi and if you're able to make a full boss rush experience in this style with bosses that are this dynamic then it'll be an absolute delight to play!