I like the design and the monochromatic palette you chose.
I think I spotted a bug that the "destroy sequence" audio is played twice when I played the 2nd time.
The boss is confusing since I don't know the reload timer and my character cannot move.
Another thing is that the wall of text dialogue is hard for me to read. Better to keep them 3 lines maximum for readability. ( unless it is just random yap to convey the feeling of it )