Prisoners are trying to escape on the conveyor belt. Hit them with a nail to hold them in place so they can be carried to the incinerator. (Gee, when I spell it out like that it sounds worse than it is...)
This game is pretty bad actually. It could have been made in 5 minutes. You have to nail stick figures to a conveyor belt so they burn in a fire pit. Let three escape... You lose. It deserves lower then what I'm rating this.