like to play the game in fullscreen mode.
you may still be able to do so, but it may require you also tweaking some of your own screen resolution settings in combination with the settings of the game.
part of the challenge, each persons personal settings can also distort the images... even in the old or current flash version... people regularly tweaked the game or settings on their computer to obtain optimal playability. not sure I see the new version being much different. people will tweak or customize settings to suit their own preferences.
you may send WGT a help request sharing your monitor type, current resolution settings, and the resolution/ aspect ratio you are trying to play the game in... they may already be aware of what will look better for you.