Not bad overall
I loved the first scene, that gave me a good laugh. I thought it would've been funnier if the sperm had actually inpregnated the main character and instead of an alien popping out a baby would have popped out.
Anyways, after those first few scenes you kind of lost my interest. The graphics were OK. I think you really could have improved the backgrounds, but I thought the drawings of the characters were very well done. The voice acting was good but there wasn't enough sound effects or music. The storyline was all over the place, and I think it would have been better to have it follow a set storyline instead of jumping from joke to joke. Or you could have done it by cutting to different scenes instead of having all the action play out at once. And the whole thing felt kind of amateur.
Anyways, good job on this and good luck on your next one.