No, no, not the Boss Demo, that's been done. The actual Demo that includes the first dungeon (3 floors), the first town, and part of the second town. The demo covers the introductions of the characters and the "game world" itself.
Is it perfect, oh heck noes! However, I'm still really proud of it, and hope the demo is worth a look. The demo is hosted over at itch.io, and is linked to from the regular game-page here on RMN.
A note worth mentioning is that combat is far from complete, but it is functional enough to get through the demo.