Wow, such a good game! This was incredibly fun and learning the patterns of the bosses and how to dodge them is satisfying, as they are very well telegraphed. The gimmick of having the character be able to climb the walls is also very interesting as it adds a new twist to the bossfights! The controls work well (I also enjoyed the down attack propelling you upwards, it was a nice mobility option!), the music is interesting and adds to the fights, and the art is simple but works very well in this case. Overall, I had a blast!
Only critique, the highlighted menu buttons seem like they have two arrows to the side, and it seems like there are more things selectable.
Personal opinion, I would LOVE something like this as a finished game. Maybe I'm biased because I finished Hollow Knight recently and this reminded me of that, but a game set in a world of machines with this style would go hard.