I love the aesthetics of this game! it's so fun to discover how to get to other planets!
Just a side note, it might be me but I had no idea I had to double jump, so I was quite frustrated after 15 mins, but then I saw your trailer and saw that you could! Maybe a note to double jump would be great :)
Also the lava balls are super hard to avoid? I ended up just toughing it out most of the time instead of timing it right. It might be a me thing.
Anyways amazing litle demo! I love it XD