User blog comment:Lkkev/Succubus Shooter (game concept)/@comment-74.129.96.228-20160206195211/@comment-26966206-20160610193118

Sex would be a bonus minigame at most. I don't feel shmup gameplay benefits from regular interruptions.

In shmups with rank, the rank rises naturally at different rates depending on your power level and/or actions. The usual drawback is enemies leveling up with you: more and faster bullets fired and occasionally more health.

Rescuing a monstergirl would probably give your squadron some very powerful ability but kick up the aforementioned rank considerably.