Honestly a really good game, and a concept I can totally get behind. The only limiting factor is that it's a jam game and thus constrained by factors like short development time, but no point griping about the things you can't change. (I'd like to one day imagine a Metroidvania-type game of this style, especially in 3D, except the bondage forms as you collect them are freely interchangeable, maybe giving slight bonuses for different styles.)
It can be a little difficult to tell where you can or can't walk / crawl, but it's not like it impacts the game's performance any. The only thing I would change, though, is having the dialogue and character portraits take up the entire play area. If you're gonna go that route, might as well make them cutscenes between levels, or shrink the portraits slightly and move them to either side of the screen so you can at least see what you're doing.