Really cool that you got a randomly generated dungeon! I like how the movement feels and the pixel art is great!
I got confused with the crafting system, since there is no way to know what you are doing I just started clicking random things until I got a big bone and some bullet things?
I guess the bone did more damage but was very slow, but maybe some damage numbers would be nice to see if its actually worth it. I made it to the first boss and was really enjoying it, until I got hit with a tiny bullet and lost half my health, and then he started shooting a lot, almost like a bullet hell. I like the idea of evading a lot of bullets and finding the window to attack, but in my opinion it would be better if it was a little more forgiving.
I overall like the game and hope you continue to work on it!