Demo is still available, but unlisted somehow.
Try this link:
steam://launch/3532520
Finally got around to playing it. Well, the aesthetics are certainly of good quality(some of it not to my personal taste, but that's just my personal taste) However I didn't get to play far in the game due to too many game breaking bugs. At some point I think I really broke the game completely, all kinds of messed up things started happening. However what I did get to play was fun, I really got into my metroidvania groove.
Of course the gamedev in me want to start being all critical about what to change and whatnot, so I will stop myself before annoying you^^