Catapulting in the Night

Your civilization is under attack by evil sorcerers and their hordes of shuffling humanoid monstrosities. Theyve waited until nightfall to strike, and all youve got is your trusty catapult and access to the local store, who has loads of stones and easy (if expensive) access to hundreds of containers of lighter fluid! Left click to launch a normal boulder into the darkness, killing all of the slow-moving horrors in its vicinity. Right click to launch a flaming boulder that will disperse the darkness and reveal the terrors beneath, allowing you to pinpoint and fire directly at them. Each flaming...