Not sure about first one, but Madison Ivy, Alex Lynn Kristina and Christy Mack.
The game isn't challenging. At this rate there needs to be 20 more levels for it to become a challenge. Level 20 isn't intense at all. I was expecting more of a build up.
There's a lot of pauses that destroy the rhythm. This is understandable in the first levels, but they're kinda annoying when they're too long during the higher levels.
Would be nice that at the end of each group of 4 challenges there'd be an intense level, like a boss level, kinda.
Another idea would be to kinda sync the beats to the pictures. Like, in the first level where the girls are still dressed, maybe first show girls that are covered up but then you insert a picture where you see part of a nipple or ass in thong, and then you increase the intensity of the beat. Gets the blood flowing.
Also more pictures in general. Sometimes you're stuck at looking at girls you feel nothing for, for about 20 seconds.
And it would also be an idea to make the beats in groups of 4, to get some sort of musical rhythm to them. It's easier for people to jerk off to a musical rhythm than random amount of beats, cuz then you don't have to look at the red dots to know when to start/stop jerking.
The pictures themselves were okay. There were a lot which I would've replaced with better ones, but that's just personal preference.