Small Australian publishing company.
Seems to have gone out of business.
Their game "Open Sesame" lists a website "www.opensesame.com" but it is now owned by domain squatters, and the last sighting of the site was 2009.
Also listed for "Enquiries and Sales" is a Post Office Box:
P.O. Box 166
It seems likely that address is no longer valid, but it appears along with the defunct URL on game boxes still sold in 2013