There’s a time bonus for completing all the stages, but it’s sometimes worth lingering on a stage to maximize points.
Every insect has its own movement patterns. Spiders move diagonally and vertically. Centipedes move side to side. Dragonflies zigzag down. Learn the patterns and anticipate the movements.
Mushrooms force the centipede in certain directions and can be destroyed if you shoot them 4 times. Destroying mushrooms strategically can force the centipede into your line of fire.
Shooting a spider cocoon will destroy the spider, but award zero points.
Some bugs, like spiders, are worth more points the closer they are to the bottom of screen.
Shoot the armor bug to get a shield that can withstand three hits.
Spiders only move in a single horizontal direction. Once they pass you they won’t turn back.
Fleas take two shots to kill. They drop faster after the first hit.