The Mina the Hollower demo felt very short.
It also felt a lot more action focused/packed than I expected. It actually kind of unironically feels more like a 2D Souls game than it feels like the old Zelda games.
Then again, Classicvania was always action focused and deadly too.

I really want to see what the full game might offer though. What kinds of secrets the game will run with and how many of them etc. If there are choices that actually affects the world. Etc.
Or if it'll be very true to Classicvania. Or if it'll have more of a Metroidvania or Zelda type of progression. The demo doesn't really answer this. It was more of an action gauntlets with bottomless pits and fire hazards. Those parts were done pretty well though admittedly, but will the full game offer more?
Yes I died twice on my way to the end. Don't laugh.