I was very close to disliking Little World and quitting after just three levels -- the movement can get tedious, the puzzles felt very straightforward and the game had a nasty habit of restarting a level as soon as I got back to the select screen.
However, something endeared me about it, and I persisted for all 12 levels (that restarting bug luckily stopped happening). Each puzzle was a fun mix of exploration and logic. I'm afraid the concept cannot be scaled well (ironically) and the movement can get a little slow and annoying, but, for what it's worth, it's a fun game.