This was fun! I think I got everything I could out of it, though I never had enough gems for the belt - so maybe there were some areas that I missed. Looking forward to the full release when it comes out. There's a lot of areas just out of reach in this demo that I must explore! haha.
The only things I could possibly suggest would be the ability to swap the font to something a bit easier to read, and at times there's dark red text on the black background that I found difficult to see.