There are few goals you need to accomplish in this game. Scavenge, scavenge for food and supplies. Kill, kill all kinds of zeds with whatever you got. Survive, make sure to stay alive for as long as you can.
Good luck, Survivor! May the lord be with your journey and Godspeed to us all!
Credits: Garnold, he is the maker of the Survival: Apocalypse which is the updated version of this game. I recommend visiting his place after you visit this. NOTE: This is the old version of Survival: Apocalypse by Garnold. I give full credit to him.
Please do copy and paste this link, it might give you an idea on crafting things.