It kinda looks like a washing machine simulator, or maybe one of the lottery machines. Either way, LemonQuest seems quite excited about its first venture into iPhone territory.
Circulate Prologue is a rather unexpected introduction, however. This appears to be a trimmed down demo of the forthcoming Circulate - a game that promises to put a 'spin' on the puzzle genre (that's what we call a 'pun', although it's not a particularly great example of one).
From the screenies, this appears to be along the and Marble Madness and Bejeweled lines, only with gravity to contend with as well. This prologue version only weighs in at a few pence if you're interest is suitably piqued.
We love a good puzzle game, and Circulate Prologue definitely appears to fit the bill. It also highlights the perturbing concept of having to buy demos, however, so be careful not encourage starving developers too much. We don't want them to become a nuisance.