Imagine how tall you'd have to be to be able to play this? or maybe it can be played 'upside down' and 'rightside up' - just like jocks on camping trips.
In more recent versions of Gnome Do (0.5 and above) you can just click 'Hide Window on First Launch' in the Preferences window (you can get the preferences by clicking the little down arrow in the Gnome Do window).
I'm really enjoying the automatic installing of plugin updates in the latest version of Do (0.5.97 - downloaded through the ppa yesterday).