Wow, there is a ton of thought and attention that went into making this. The challenge rooms and chests go a long way towards keeping the player engaged. I really, really like the decision to make sex with enemies a bonus rather than part of the core gameplay. Lots of other action sex games have it as part of the mechanics which tends to drag out the game and ends up as a punishment instead of a reward.
The sound design is excellent. I like the retro-style noises and I appreciate the shower ambience. The transparent steam effect also goes a long way towards setting the mood.
Only two things come to mind as potential improvements. Up presses should prioritize in order of items>doors>sex, and your previous powerup should drop so you can pick it back up if you don't like the new weapon.
Great game!