Hi lacarrye!
If you want to protect your game from being archived by search engine, do the following:
1. Open/Edit each HTML file from your game
2. In the beginning of your HTML file (between the <head> </head>), enter the following code
<meta http-equiv="Pragma" content="no-cache">
<meta name="robots" content="noarchive">
<meta name="robots" content="noindex">
For the password protect of your game (like you want user to pay to play), I recommand you AuthPro, wich include high quality password protection for your page and directory, and it include a fully integrated pay plateform, and his a great automation script, FREE and no installation needed.
www.authpro.com
Hope it help!
*EDIT*
Or after you've added the above code in each HEAD TAG of your HTML file of your game, OPEN/EDIT the index.html file and just after the META TAG, add the following code
<SCRIPT language="JavaScript">
<!--
var password;
var pass1="ENTER_YOUR_PASSWORD_HERE";
password=prompt('Please enter your password to view this page!','');
if (password==pass1){alert('Password Correct! Click OK to enter!');}
else{window.location="ENTER_THE_ERROR_URL_HERE";}
//-->
</SCRIPT>