You are a spider that spins its web to catch bees, ladybugs and other insects. The fly is the more harmless, the ladybug is stronger so it will give you more points and life if you eat it, but it can break the thread where it's tied. And the bee can even hurt you if you eat it, but you should do it anyway because it's so strong that it can break your web. The rest of the bugs, you should discover by yourself.
Click and drag from one thread to another to weave the spider's web. You have to do it all the time because insects crossing it break it partially. Click on trapped insects to eat the (you recognize them because the thread where they are tied becomes red).