This is surely a solid entry for this game jam! I'm not going too spend too much time talking about the art or the audio, you already know those are awesome.
The problems I had with the game revolved around the difficulty, it was too hard, and not in a good way (at least not for me). First, the shield layer would pulse to reveal platforms, that made me wait frequently or not know what I was jumping at sometimes, which made me take damage based on luck. Second, the character attack direction was fixed by it's movement, and not its mouse orientation (why use the mouse button if it doesn't direct the attack?).
But those are just minor problems, the gameplay was really enjoyable, I loved the RPG style where you collect new items to go through known places, it also fit the theme well!