For me, a great concentrated Blob game: accessible to smaller, casual players, but not quickly done, little games to unlock progressively, a well scripted story, a true graphic universe (inspired by graffiti and the Revolutionary imaging), varied jazzy atmosphere and scalable depending on the game itself, a playful spirit, without violence (although we appreciate crush the wicked is very "soft"), a little room for creativity (you can choose colors) ...
This is a game that can be easily seen dampen the price / quality ratio, and to which we can play long enough without going in circles.
Plus: once earned levels, we can either try to succeed the better (we have the data on the successes and goals, eg "painted buildings: 3 of 5") is just for fun painting the " places "of the game without the difficulties of time and villains (ideal for small, my 4 year old loves!).
One of my favorite games!