If you eat a Plump Perogi and some kind of defence increasing food, you can polish him off in about 30 seconds (or before the shot power-up runs out, at any rate). Just make sure you have plenty of health food if you're going to go for this strategy, as the worm has plenty of nasty attacks which are difficult to avoid. Just remember the 5 D's of Dodgeball. Dodge, Dip, Duck, Dive and...er....Dodge... (but never stop shooting!)