Wasn’t expecting much, but Storio (storioai dot com) turned out to be pretty awesome. You can build interactive novels with decision points and art scenes. Just leaving this here in case someone else finds it useful.

Dude, this story is AWESOME! I really enjoyed reading it; it was clean, no grammar or spelling errors, and the plot was HIGHLY pleasing! Thank you so much for posting this story; I had an excellent time reading it! :)