Hmm...
The biggest problem with this game is its concept.
Even from the start, the game amazes you with ridiculously confusing gameplay. First of all, very few people expect that rolling the mouse around the "coil" (circle in the middle of the screen) will advance. People are so used to waiting for the advance to happen instead of trying to prompt it that they sit there and become annoyed when it never does.
The first level is a bit of a waste of my time. Anybody with even minor sexual education can guess the goal. The second is somewhat entertaining. Afterwards, the third is enjoyable, but too painful on the hand. The fourth is too confusing and boring to do once figured out. Fifth is boring, not only is it obvious but it's mindless. And the sixth has no clear goal.
If you really want to make a game like this, improve the gameplay. Make it more puzzling, in the right ways, and make it more entertaining. Although the music fits perfectly (however, I would like to be able turn it off) and the graphics are superb, this game needs to be more enjoyable.