http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/window/
http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/window/windowcreate-r462
I use c++ and don't know much about the LUA syntax however change the camera create in your App.lua file.
Sould look something like this...
self.window = Window:Create("Leadwerks", 0, 0, 1024, 768, Window:Fullscreen);