Gave it a try as promised, there is not a lot to it just yet but it looks promising, visually it looks as good as 1bit allows, I did like the main character and monster animations as well as the moving mountains backgrounds; The music and what I think is spatial audio was very well implemented and adds so much to the Gameplay, the inventory is another thing I did found was well done.
Another nice thing is offering the game in multiple languages.
Now, for suggestions I think there must be a better controls scheme, like switching X and C functions or going for something like WASD-JKL; the tutorial can definitely be improved and most important of all for a game like this, the lore needs to be interesting from the beginning, otherwise you may risk loosing people's interest.
Also I highly recommend gibing the player some control over fullscreen/windowed resolutions and sound levels.
Overall and for a DEMO version it looks promising and has very solid fundamentals.