Very good idea, I loved it! It has so much room for improvement. I saw one of your comments saying that you'll add music and sfx and that's great! I'm looking foward to the final version of that game.
One thing that I must add is that I could kill almost every boss just standing next to them and spamming C and I don't think that this is how it was supposed to work :(
Viewing post in Chamber Hunter jam comments
I think it's not about HP. I could stand very close to the bosses, dodge some attacks and kill them in a very short time (I also tried not dodging and could do the same thing) so I think having more attacks that track the position of the player, attacks that deal damage in area or attacks that damage the area of the boss would solve that issue.
Also, the "cowboy" boss was interesting because of the fast movement around the screen!