Attack of the rook!



That's a silly opening sequence. That opening is generally a poor choice. Against it, 1. ...d5 is the most common response (it claims more centre than d6). But really anything but g6 or g5 is plyable against it. I'm curious though, how useable is it in the hands of an expert? I know Basman's had some fun with it. And I think Bill Wall has as well. Not being an owner of any chess software, I wonder if it is possible to have a strong program play it.
I prefer a4 because it is still sensible to castle kingside with, but on the other hand, a4 may discourage many opponents from doing so as well.

Rooks are like heavy artillery
you don't want them on the frontlines
you want them controlling long open/semi-open files
you never bring out your heavy artillery without being protected!

Bringing out your Rook that early simply makes it a target. You'll spend all of your time trying to defend it or move it to safety. General order of development: 1. put a pawn in the center, 2. develop your knights, 3. develop your bishops, 4. castle, 5. connect your rooks by moving your queen. These are generalizations and so are not necessary rules but a good way to begin playing sound games.
Also, Pavrey is completely right, don't move your kingside pawns as you've shown or your kingside castling position is completely ruined. At most you could use g3 to fianchetto a bishop at g2 or use h3 to discourage a bishop or knight from moving to g4 as often happens.
a simple way to get your rook out from hiding: