I'm just going to be honest but 3DGS ain't worth buying. The engine is pretty much outdated and not much change have been introduced since the last version or never find any use of it. I switch my project to Unity after finding allot of difficulty in starting my prototype of a prototype game. Unity also support JS and Boo but C# is common for Unity users and learning C# is just like learning VB which will take you less than an hour to learn and start programming with it. And you don't have to pay a cent for the full feature with multiple platform support.