Played 2.14.6. Finished in about half an hour.
In short; Excellent visual style with unique and effective (but short and minimal) sex scenes - they certainly won't be for everyone. Quite different in gameplay than the developer's previous game, and certainly less engaging and less ero-dense, but also short and to the point. Dialogue is not terribly well translated, but the plot itself is actually pretty okay. Some creative stuff there.
While gameplay is certainly RNG-based and simplistic, it isn't a roulette game. There is strategy in choosing when to use certain powerups, and while you can get a bad roll of the dice, it is very easy to just start another run.
I do find myself wishing that there was some kind of central in-game hub from which to choose missions where the available "rivals" gather, rather than just choosing them directly from the title screen. Interacting with the girls was part of the fun of the developers' previous game, and I feel like it could be easily incorporated into this one without losing its different approach to gameplay.