There's 107 patrons right now so it's not like nobody is buying it, albeit most of them are probably Japanese. Patreon games in general aren't shared much because it's incomplete and people will always be chasing the next update. Melody Blood n particular is somewhat niche as most of the scenes are just ryona.
I've had some luck finding some Patreon games by digging around Chinese sites through Google. I don't understand any of it but the title is in English and you just hope there's a public link. There used to be a Baidu thread where a user (JustinGG9) would regularly post new Patreon/Enty demo links, including Melody Blood, but the thread disappeared for some reason. If anyone can find out what happened, they might've started a new thread somewhere.
Old thread link for reference, you might be able to view a cached version (taken from Unholy Disaster post):
You must be registered to see the links
Idk how Baidu forums work but it was posted under some 0cube header and from what I can find, 0cubepara is a site that has hgame downloads but requires an invite code to join.
Edit: From what I can see, there's a link on Gtloli posted on April which should be the March snapshot. It does require an account but I was able to navigate through with Google translate. You also have to make a post to see the link, simply copy whatever is being repeated already. I have poor connection so perhaps someone can check and upload it outside Baidu download.