I have been doing alot lately on Castaway but everything came to a stop when it came to the Saving system, i was using a saving system called Unity Serializer but after only building one island the saving system failed making it take 2 minutes to save and crashing when it loads the save.
So now i will have to create my own save system using PlayerPrefs which will delay production of Castaway for a little while longer then it should be. But the good thing about it is that it should work! ;)
