Make "Open URL" behavior take an expression
This seems like a no brainer to include in the GS editor.. the Open URL behavior currently can only have a static link, but it should be able to be an expression instead so we can include attributes in the link. One use? To let users submit scores to a high score server (php script or otherwise). Since we have no built-in networking support, this would let us run a high score server and allow users to submit to it and view the high scores.