Thanks for the feedback. A lot of what I ended up doing in this first one was experimentation: getting ideas, trying them, and keeping them in if I thought they were at least somewhat worthwhile. In general I think slut mode works fairly well for what it is: another little bonus on top of the usual stuff. It does potentially drag a bit, but I think the assumption is that by the time you hit it you don't have that many mobs left to get through. Always room for improvement though.
Not sure what you mean on cutscenes. If you mean you can't skip longer bits of dialog, that's true, but you can hold down enter to skim through them faster. If you mean the actual sex scenes, you absolutely can miss them, which is why I have the scene guide up. The slime is an early attempt at a trap, and adding some stakes to exploration: might get some stuff, might suffer a debuff. Of course ideally there'd be art paired with it, but that particular one never got to that stage, in part because it's so basic. I'm continuing to evolve the idea in 2 (no slime, just a few unexpected things), and I think it'll be a lot more interesting.
No special reward for completely clearing the map. The focus of the game is in getting to and achieving an objective, so fighting guys you don't need to is usually a waste of resources.