Nice story with undertale-like battles.
It is great how you introduce patterns separately with their difficulty increasing, and then combine them together. I would only wish for that combination to decrease the difficulty for both of them a bit further, as it just gets too hard with a risk of retrying 6 easy stages to come back (maybe having a checkpoint once the character is changing would help).
It's a good implementation of this idea with some awesome art and music, great job, everyone!