@Boreal - thank you! We believe in using renewable energy resources

@Gamedragon - thank you! I'll let the artist know. We went through so many iterations of names (see the next response)
@bdsowers - we WERE going to call it A Murder of Crows! But there is a card game with the same name that we didn't want to infringe on. An Unkindness of Ravens didn't have a nice ring. For a while, it was going to be A Murder in the Sky, but a Google search on that name would return horrible air line stories that we didn't want to be associated with. We went through so many iterations, until we decided to come up with a group name of our own. Quiver implies arrows -> shooting/shmup, and a quick friends test later, we had our name. I will pass on your valid concern about distinguishing the silhouettes.
@Ticebilla - haha, thank you!