oh hello!! i'm testing this on my game (it's going great by the way!!) but i've run into an issue. i'm making a vn in nvl format and the seen text works fine but the choice buttons don't change color after being chosen. i compared the code in my screens.rpy and gui.rpy with your code and nothing seems different though, which is strange. can you help? T_T
Heya! :D I took a look at the code here on the page and everything seems to work even when switching everything to nvl. Admittedly there wouldn't be anything added to gui.rpy regarding nvl text (only the sayseen color and toggles), so the rest should all be under NVL Screens in screens.rpy. Did you also add the "nvl_chosen" and "nvl_chosen_text" styles from screens.rpy? That's where the color changes should be defined and should happen.
If all else fails, feel free to DM me your code so I can take a crack at it and figure out what's happening on your end