It's 3.08pm on a grey, misty Tuesday in April. You're in Mr. Mason's Maths lesson, falling asleep to the steady drone of his voice. You're on the verge of sleep, your eyes drifting in and out of focus - when suddenly you notice a zombie, drawn in the corner of your exercise book.
You notice more and more appearing out of nowhere, the onslaught moving towards your turret with every passing frame, and it is your task - nay - your duty, to ensure the turret's survival.
Click to shoot bullets at the marauding zombles. Press Escape to pause the game.
The game gets harder as your score improves, with the mass of zombies ever increasing in number and speed. Remember - absolutely nobody is counting on you. This is a figment of your bored imagination.