Working backwards:
- if you're using Super Videotome you can ignore the classes bit, that's a leftover comment from ADV that should have been removed. as long as you have set up your character names in the SPEAKERS array in assets.js you're good.
- if the game is blank in the browser, have you run a local server as per instructions in the Offline Testing part of the readme? It won't work just run directly from your computer without. Otherwise hard to diagnose sight unseen.
- Choices have a number, a text to display, and a chapter name to jump to, e.g. CHOICE1:[text here]:CHAPTERNAME. They will not block text progression while showing, unless you are at the end of a chapter. When picked the choices will disappear and jump you to the new chapter, or they can be manually cleared via the remove command, e.g. REMOVE:1 to clear the one above.
Hope that helps!