Yes, I can confirm it's actually fuckin hard. Tried many times, couldn't do it :(
It is visually kinda crazy tho, especially the animations for the boss. Music and sounds are good, I just miss a feedback for the sword attack. I encountered a minor glitch (I think?), because sometimes I can jump very high, and I believe it might be related to the platforms; if I jump and I'm close to a platform it feels like I double-jumped instantly.
Great vibe and nice characters, I would recomment to expand it <3