Version 0.72

New 'sort of looks like a cannon on wheels' monster type; New 'approximate equivalent of DN1 rabbits' monster type; New special objects 'antivirus floppy disk' and 'master computer' (see plot); New type of floor that auto-crumbles after hero walks or jumps twice on it; New high-voltage barrier; Fix the falling Acme blocks implementation; Level updates; Add draft storyline/plot; Bugfixes