The game can be rather challenging, but you can collect upgrades to your sword and energy shot along the way, as well as other bonuses. Many people play for the h-scenes but the plot is actually nice and it almost looks like a parody of the genre.
Different artists worked on the visual art, so they're not all so awesome; not like a leech-girl could look better anyway.
You can employ anything from charisma to blackmail to optional hypnotism.
The game is in English, but there's no text apart from the start screen and the in-game menu.
The demo goes until the first boss and gives a good idea of the game.
The game is very difficult, but provides infinite quicksaves and has very tight controls; as a bonus Marie's current level of nudity is reflected in cutscenes and the ending, so you're rewarded for playing dangerously.
Similar to The Legend of Zelda by dungeon and sword-play.
Porn is average, but the personal narrative & player agency is stellar.