Technicals: lighting is well done, no blown highlights. Composition is fairly static and probably could have been livened up. A diagonal approach with more curve to the tail? Maybe even an "egg" to give a bit of an action feel.
Feel: A cute idea, but sesame seeds don't have a lot to do with sperm, eh? So while it certainly meets the challenge on more than one level, the connections feel forced. The static composition leads to a static feel.
The Game: I'm not sure sperm is a winner on DPC. :) I applaud your creativity however and say keep it up.