The Lust of Delta is a battle-fuck style RPG where a Rance style scumbag uses a hot pixel girl to fuck his way through a warship taken over by fuck monsters.
Don't come here for the story and don't come here for the characters. The characters each have a single dimension and the story seems to think it can drift between grim dark and sex pests are funny on a whim. Frankly, it's typical Rance bullshit, so if you're into that you'll enjoy it. If not, try to ignore it or move on.
On the other hand, the gameplay is actually kind of fun. It has an element of skill, an element of strategy and battlefucking, which is an enjoyable combo. I'd consider giving the game five stars if the game was either a little bit shorter or a little bit crunchier or more strategic.
I also enjoyed the pixel art, though there's really not as much of it as there could be for a game of this size. It'll only take you an hour or two to beat, but there's really only about a dozen images. It's ironically rape on win and there's a recollection room with most art on beating the game.
Overall, I'm a little on the fence. On the one hand, I honestly enjoyed the gameplay and art until I got near the end. On the other, I fucking hate Rance-like characters and humor. I think your mileage will vary greatly based on your preferences on this game. I personally pushed through it, but I could see people burning out on it or just hating it as well.