Doesn't do a whole lot, but the boobs are nice.
You can hypnotize her into stripping and letting her play with you, or you can put a hypno helmet on her to make her say whatever you want or make her walk left or right.
There's also a toggleable mechanic that does pop up "ads" about hypnosis.

She says a few things related to science, mice, cheese and her bust, though you'll see everything she has to say pretty quick.
I'm also pretty sure she doesn't have any interactions with windows or any reaction to anything you do in those windows, so mostly all she does is meander around the bottom of the screen(s).

Anyway, probably not worth using this if you're not into hypnosis, but a busty mouse is a busty mouse. Hoping the dev adds more to it.