Pretty good. Simple, yet addicting.
Mildly annoyed there's no pause button. Not the worst thing in the world though.
I can't tell if it's the game doing this on purpose or not, but I've noticed that it likes to spawn the next drop in a way that prevents you from getting the bigger boobs power up, at least once you're a certain size. It's actually really annoying to go "Well, I can't go get that because if I do get it I'll miss that drop for no benefit." Juggling only goes so far and frankly I'm not good at it. It often leads to me missing more drops, which just makes things more frustrating.
I think a "grid assist" mode might help, for those players who want to have a better idea of the hit boxes. Particularly at smaller sizes. Grid Assist mode would not be valid for sending a high score, since it's mostly practice.
Not surprised on the size limit, but I did enjoy the fact that jumping when big enough caused a quake of the background on landing.
All in all, definitely would be something I want to download and tell others about.