I love the idea of freeroam and multiple characters. Sort of something I'm going for with the Asuka/Natsuru narrative but I do have other ideas as well related to multiple characters. Freeroam will have to be something added towards the end of the development, I want to focus on the story and routes/endings for now.
'Naked Adventure' was great, loved that game. I would love to add something where a sprite is onscreen, which changes depending on whether you're running, crawling or walking, with changes in outfit (or lack of) represented.
I'm going to try and make sure that the game will be playable via browser for as long as possible.