While i was installing WA, then i played it, the screen became too big , it zoomed the game, and i can't click into the X to quit ! Help me ( Picture not working )

There isn't an X to quit W:A. If you want to quit, press the exit button in-game, or press ALT-F4.

Also, have you installed the latest beta patch? It contains updates and fixes for many problems.

You can download it here:
http://worms.thecybershadow.net/files/WA_update-3.6.29.0_Beta_Installer.exe

to see the "exit" button while playing a game press the Escape key.