Super chaotic (in a good way)! Once I embraced that everything was gonna be broken I had a good time progressing through the level. I think the music did a really good job of emphasizing the chaos.
I found "J" for shoot unintuitive for some reason and so that was a big sticking point for me on my first run - i kept jumping when I meant to shoot and vice-versa. I also found it a little hard to tell me when I was actually being hurt by the environment vs when a part was just falling off randomly, which was kinda confusing. I ended up just farming enemies to stay at full health most of the time as a result.
I made it to what I think was the end? There was an obstacle that I couldn't get around a couple of screens into the game. Let me know if there's a way to avoid it and I'll give it another try :)