I'm not usually a fan of rouge like games, but this was a lot of fun. I love the aesthetic, and the way it handled for the most part. Jumping feels a bit weird to me, I'm gonna agree with those that are mentioning mid air control would be well appreciated.
My biggest concern though was the fact I would find spots that have a key or chest that are out of reach. Like I should have a double jump available to me. Not sure if there is an item that allows double jump, or it was an issue of the item spawning in a bad/unreachable place.
I also couldn't look at or change items/powers like the menu said I could. Might just be due to this being a demo.
So far I'm excited to see where this game ends up when it's finished.