From the title I thought this was going to me a visual programming approach to game programming ala GameMaker™, but it's apparently restricted/focused on top down RPGs and strategy type games. Still pretty cool, though.
The platform provides the tools to make top-down and isometric games. It is also open source, so if you feel that you want to add more to it, you can always hack the code and add any functionality you choose
The server is based on open standards and technologies, so modifying it should be straight forward
The server is based on open standards and technologies, so modifying it should be straight forward