To create your 'romance visual novel', start by planning the plot. Decide on the type of romance - whether it's a sweet first - love story or a more complex, angsty relationship. Next, write the script. Make sure the dialogue is engaging and reflects the characters well. For the visuals, you can either draw them yourself if you're an artist or hire someone. As for the programming part, like I said, Ren'Py is a great option. It has a lot of documentation and a helpful community. You can also add music and sound effects to enhance the overall atmosphere of your visual novel.
To create a Lovecraftian visual novel, start with the story. Come up with a plot that involves elements of the unknowable and the terrifying. You could have a protagonist who stumbles upon an ancient cult or a forbidden artifact. For the art, use a color palette that gives a sense of gloom and doom. As for the characters, make them complex, with their own fears and desires that are affected by the horror they face. And, of course, add elements of the supernatural that seem to defy explanation.
You can use game - making software like Ren'Py. It's a popular tool for creating visual novels. You'll need to import Minecraft - related assets like textures and models if you want to give it a Minecraft feel. Then, you write the story, design the characters' dialogues, and create the decision - making points.