The aesthetic is so cool! It immediately had me itching to throw a 'lil prototype together!
Amazing job, especially with having made it such a short time!
I have some feedback for the sprite sheets: it would be helpful to use a frame for the characters, 16x16 or 32x32, so that when Unity users go to configure the animations, the sprites don't need manual adjustment. This is because there are a few frames that are larger like the skeleton with a sword (and others). See attached for example w 32x32 frame.
Keep up the great work!