Just had my first go. I spawned by the lighthouse and began working my way through the little villages following the railway tracks.  I found some gloves,  a wrench and an empty backpack on a farm,  saw one zombie who gave chase, but which I managed to lose round some buildings.
I eventually starved to death an hour and a half later just before I reached a largeish town, as the only food I'd been able to find was a single rotten apple. 
Awesome fun however, more awaits tomorrow!
I couldn't find a jump button, is there one?