There are a whole lot of ways to kill bugs. You can step on them. Spray them with bug spray. Blast them with a swatter. In Throw The Knife, you've got another option: impalement by knife.
The target in front of you is littered with bugs. Eliminate them by hurling throwing knives their way. There's not a whole lot of technique involved in the throwing. A short, quick swipe will send a knife in the right direction. Things get tricky when the bugs are overlapping your -- what is that thing? Let's go with 'rag doll.' You'll lose a health point every time a knife inadvertently hits the doll. That's when your fly sniping skills get put to the test.