This is quite good as a demo! All of the placeholders that are needed seem to be set up, and there's a proof of concept with the farming mechanic and crafting items. I imagine that there's a lot of work to making so many different aspects of a game, and you have the start of something interesting!
I especially like the cute portrait art! Youmu's outfit looks cool, and I enjoy the other artwork that's in the demo so far. If you decide to add more to this idea later on, the largest thing to mind at the moment is the text readability. Bright colors on dark panels (or vice versa) tends to be the most visible. White on dark gray is a common choice, but there are various other solutions ranging from use of outlines or shadows, to bolder fonts.
Otherwise, this demo is a good start on the makings of a game; well done!