Hii, cool little demo you've got there.
Obviously I can't say too much on the metroidvania aspect or gameplay, since the playable area is tiny. I liked the character movement though, it was smooth and snappy!
The artists did a great job, this is very enjoyable to look at.
I don't have much more to say, as you mentioned on your game page, the game is unfinished, so I hope you folks manage to create a complete game sometime!