Thank you for comment. I will answer your questions in order:
Sex is triggered when enemies are very near the player, like very near. Also make sure you allowed NSFW content in game options.
I don't know what you mean about useless abilities. I have plans to add more, but it's work in progress.
You can restore health by finding vials, which drop from crates, jar and barrels. Or if you have "Blood" type weapon.
Having a tutorial would be nice indeed. Having controls prompt isn't enough.
I turned off VSync deliberately, it was causing really heavy performance spikes.
And you are right about messages. It just never come up in my head for some reason.
It's always helpful to read people's impressions and thoughts about my game. And I'd like to think, that it will slowly but surely improve my skills. Thank you very much for comment.