This is a really cool take on the theme. Haven't seen this yet. Well done! The pixel art and greyscale work really well. I really like the core concept here. However, I was having issues getting the different weapons to work. I had to give up on the second button level because the game wouldn't recognize the boomerang command. No matter how many times I tried, it kept making a sword, even when I was very clearly using the boomerang command. I also noticed that pressing X with no bone drawing resulted in a hammer. This is way easier to execute and worked a lot better for fighting slimes, but i'm sure an unintended bug.
Really cool game for a 48 hour jam though. Very ambitious and nearly makes it there! Well done!