Vivid narrative environments, you did a very good job of capturing the spirit of an alien world. I played it all the way through to the good endings.
The changing colors for different environments were very effective for setting the mood, but were a little too drastic, especially when switching from white on black to black on orange. Maybe a more subtle transition of colors, or changing just a portion of the screen (borders, sidebar or the header) could have a similar, but less visually overwhelming effect?
Some of my favorite horny content was actually in the enticing environmental descriptions. I want to touch all the weird alien sexual thingies.