I was a little shocked after playing this game to see how high of a rating it had on here. Maybe I've been spoiled by superior battlefuck games which have released since this, but there's nothing here that hasn't been done better in other games.
Gameplay - 5/10
The fights are competent and reasonably balanced on Normal difficulty (enemies have too much HP and fights drag for way too long on Hard), but it's nothing more than fighting groups of the same enemies over and over - every area is almost entirely composed of one type of enemy - not that it matters since every enemy behaves more or less the same. The fights become somewhat more interesting later on once you unlock more abilities, but it's nothing special.
H-Content - 6/10
If you're into bestiality or pregnancy, then this game has the goods for you - I'm guessing that's a big part of all the positive ratings. I'm not into these things so it's difficult for me to judge.
H-Integration - 5/10
But I couldn't help be very disappointed that all the battlefuck sprites are just the same reused poses over and over - this really takes away from the potential uniqueness of the enemies and battlefuck. There are erotic statuses you can contract during battle which last afterwards - pregnancy, itchy nipples, worms in the womb, etc - but once you figure out who to talk to or what to buy, it's a simple matter to remove any and all of these conditions, rendering them basically pointless. It just doesn't come together.
Story/Writing/Characters - 4/10
Story is okay, characters are trope. Basically a time traveler comes back and has to kill the queen of bugs before it turns humanity into a seedbed. I like the idea, but the story is so short it can't really go anywhere.
Overall, it's probably worth a play if you like bestiality, otherwise avoid.