I had a look at the game.
I couldn't figure out what happens with the weapons, but I was able to get to the boss by dodging the enemies. I may have missed the "How to Play" option at the start and was unable to get back to it.
Somehow, after I died in a red glow, lots of little minions started attacking the boss.
Regardless, I liked the art style and think it could be a fun game.