Super cool visual aesthetic and character writing. What I like most is the monochrome effect on winning combat. Very stylish.
I also liked the tentacle sex scene. I personally am not a fan of hiding the NSFW content behind losing intentionally, but I am aware that many people don’t mind or even like that trope.
Too bad that the “compact yet wildly inventive turn-based RPG” aspect didn’t really come through. The combat system feels very standard JRPG. The only gimmick I could see is that each special move only has a limited number of times it can be used with each won combat awarding one additional use for a move. But I think all this would lead to in a more complete game would either be forcing the player to grind for moves (if you had infinitely repeatable battles). Or make the moves “too awesome to use”, meaning players will just save them up for boss fights. Which would make non-boss fights very boring.
But I think you might be on to something here. If you put in a year or so of work, then you could turn this into a proper game with more solid game mechanics and a complete story that could garner some popularity.