App developers, I think it's time we put a moratorium on the titling of games with "(Adjective) (Animal)", don't you think? It's getting a bit tired, and trying to emulate Angry Birds doesn't really do you any favors.
Anyway, on to the review.
Greedy Spiders is a turn-based puzzle game in which you are looking to save flies from their grisly demise at the hands of the aforementioned Greedy Spiders. I believe the fact that the spiders are greedy has to be highlighted, because otherwise you are just preventing them from eating.
You free the insects by chopping off spokes of a spider web one at a time; the spider will then take its turn and move down a strand, shifting play back to you.