I am doing something close to "storytelling-focused games like some I've played, stuff that's more like a VN". And to do that I am only using HTML and CSS. The result is a webcomic of an unusual kind illustrated with pixel art designed for RPGs.

This way it does not require programming and hence I can focus on the story. You can check out one of my stories here : https://drdru.github.io/twc/twc_save_aryn/01_intro.html (it's in Japanese, click on 次 at the bottom to go to the next page and get a feel for it).

There are also Javascript framewrok that allow you to create RPGs in the browser. You might want to check them out.