I liked the demo, but if you want to fund this through Patreon I do think you need to give people a bit more to work with than 3 minutes of story. As you yourself state on your Patreon page, there are a lot of VN's on the market. And while it does seem to be good quality stuff you are making here, the demo is just not long enough to get people invested in the story, the characters, or the world you are building.
I do really hope you continue though, I got strong 'City of Broken Dreamers' vibes from this and I'm digging it.