added nicety links on a few pages

levels/login/login.html

@@ -22,3 +22,13 @@
 	<input type="submit" value="Log in">
 	<a href="./register.php">Register</a>
 </form>
+
+<p></p><p></p>
+
+<p><small>Netsim was created by 
+	<a href="https://erinn.io/">Erinn Atwater</a> based on a project with 
+	<a href="https://cs.uwaterloo.ca/~cbocovic">Cecylia Bocovich</a>.
+	Some device images were designed by 
+	<a href="http://www.flaticon.com/authors/madebyoliver">madebyoliver</a> from Flaticon.
+	View Netsim's source code on <a href="https://github.com/errorinn/netsim">Github</a>, or tip the creator on <a href="https://www.patreon.com/errorinn">Patreon</a>.
+</small></p>

listing.inc.php

@@ -4,6 +4,8 @@
 
 <p>Welcome to Netsim!  If this is your first time playing, we recommend you start from the first level below, and work your way forward.<p>
 
+<p>Please note that this project is still in <strong>beta</strong>. If you find any bugs, you can report them to <a href="https://twitter.com/errorinn">@errorinn</a> or open an issue on <a href="https://github.com/errorinn/netsim/issues">Github</a>.</p>
+
 <?php
 
 $res = $db->query("SELECT * FROM category ORDER BY orderby");

register.php

@@ -31,6 +31,8 @@ include 'header.inc.php';
 
 <h3>Register</h3>
 
+<p>User accounts are only used to track your progress through levels. Please note that Netsim is still in <strong>beta</strong>, so we may need to reset the user database from time to time.</p>
+
 <?=(isset($login_error) ? "<p>".$login_error."</p>\n" : "")?>
 
 <form method="post" action="register.php" onsubmit="if (document.getElementById('reg_password').value == document.getElementById('confirm_password').value) return true; else { alert('Passwords don\'t match!'); return false; }">