Great game
Great game. Like the guy below me said though, mobbing is an issue. I found a rather effective way to combat it though. I beat the game with the following strategy: Strong kick one entire side until they're dead, strong kick the other side until there are 1-5 remaining and they are low enough hp to be taken out with a single grapple, and then sex grapple the remaining guys, which gives health time to regenerate. If this is the sort of strategy you want to encourage I'd suggest adding some kind of regeneration or drain during your grapple, so you regain hp faster while grappling.
As for the stacking goes, it turns out they don't actually have to be huge mobs at all, just two on one side can sometimes be enough to take krystal/the new girl down.
And yeah, it gets laggy for me when there are 6 or more monsters on screen.
By the way, I love the layered cum, by the end of the game my babe was absolutely covered.