Flock! evokes memories of my sister's bedroom when she was little. At the time, the "quilted" look was all the rage when it came to baby decorations and my parent's happily latched on to the trend. Everything in Flock! features a hand-stitched look, which is refreshing considering the hard-lined, sharp-edged look games usually seem to trend towards. Levels aren't incredibly large, but still interesting enough that you'll want to stare for a bit (well, until you realize the timer is running).
Animals share the same "soft" look and would also find a place in my sister's bedroom. Rather than go for a "realistic" look, Flock!'s livestock look like toys. Sheep are little more than fluff-balls with legs, pigs are round and cows look like a stack of bed sheets. It's a great look and when combined with the jazzy soundtrack, it helps to convey a fun feel.