Humor in FLOCK! helps out immensely, but can't make up for the local co-op, it's too flocking difficult! Physical barriers like a single screen and bouncing ships are as fun as a bow legged sheep. However, having co-op specific challenges, and custom co-op maps are a nice addition, too bad FLOCK! isn't at a more affordable price.
Two player local co-op has players each controlling their own ship.