That's actually a great question! It wasn't inspired by Crypt of the Necrodancer, I didn't think of it when I started working on this idea. But when I finished first prototype, I thought "wow, this feels like CotN so much". It's not a rhythm game ofc, but they definitely have the same feel because of the core mechanics.
What's funny, is that I really don't like the core gameplay of CotN — however I produced a similar idea.