diff --git a/resources/rulesets/iceage.txt b/resources/rulesets/iceage.txt
index ca69fa9..b83d904 100644
--- a/resources/rulesets/iceage.txt
+++ b/resources/rulesets/iceage.txt
@@ -1,7 +1,5 @@
 ## Ruleset which attempts to model retreat of ice after an iceage
 
-if generation is less than 5 then state should be ice
-
 ;; Limitations: because the rule language doesn't (yet) allow sophisticated
 ;; arithmetic, the ice retreats north to south (southern hemisphere).
 
diff --git a/resources/templates/about.html b/resources/templates/about.html
deleted file mode 100644
index 94f188b..0000000
--- a/resources/templates/about.html
+++ /dev/null
@@ -1,6 +0,0 @@
-{% extends "templates/base.html" %}
-{% block content %}
-    <div>
-        {{content|safe}}
-    </div>
-{% endblock %}
diff --git a/resources/templates/base.html b/resources/templates/base.html
index 6b208f3..1419ab8 100644
--- a/resources/templates/base.html
+++ b/resources/templates/base.html
@@ -16,13 +16,14 @@
             var context = "{{servlet-context}}";
             //]]>
         </script>
-    <meta content="{{seconds}}" http-equiv="{{maybe-refresh}}" />
+    <meta content="{{pause}}" http-equiv="{{maybe-refresh}}" />
   </head>
   <body>
       <div id="header" style="background-image: url( '{{servlet-context}}/img/earth-space-strip.jpg');">
         <div id="nav">
           <ul class="nav">
             <li class="{{home-selected}}"><a href="{{servlet-context}}/">Home</a></li>
+            <li class="{{params-selected}}"><a href="{{servlet-context}}/params">Parameters</a></li>
             <li class="{{rules-selected}}"><a href="{{servlet-context}}/rules">Rules</a></li>
             <li class="{{world-selected}}"><a href="{{servlet-context}}/world">World</a></li>
             <li class="{{about-selected}}"><a href="{{servlet-context}}/about">About</a></li>
diff --git a/resources/templates/home.html b/resources/templates/home.html
deleted file mode 100644
index f2ebe9f..0000000
--- a/resources/templates/home.html
+++ /dev/null
@@ -1,6 +0,0 @@
-{% extends "templates/base.html" %}
-{% block content %}
-  <div>
-    {{content|safe}}
-  </div>
-{% endblock %}
diff --git a/resources/templates/world.html b/resources/templates/world.html
deleted file mode 100644
index f2ebe9f..0000000
--- a/resources/templates/world.html
+++ /dev/null
@@ -1,6 +0,0 @@
-{% extends "templates/base.html" %}
-{% block content %}
-  <div>
-    {{content|safe}}
-  </div>
-{% endblock %}
diff --git a/src/mw_ui/routes/home.clj b/src/mw_ui/routes/home.clj
index 841aac5..3a3ced8 100644
--- a/src/mw_ui/routes/home.clj
+++ b/src/mw_ui/routes/home.clj
@@ -1,6 +1,7 @@
 (ns mw-ui.routes.home
   (:use compojure.core
-        [mw-ui.routes.rules :as rules])
+        [mw-ui.routes.rules :as rules]
+        [mw-ui.routes.params :as params])
   (:require [hiccup.core :refer [html]]
             [mw-ui.layout :as layout]
             [mw-ui.util :as util]
@@ -8,17 +9,17 @@
             [noir.session :as session]))
 
 (defn home-page []
-  (layout/render "home.html" {:title "Welcome to MicroWorld" 
+  (layout/render "trusted-content.html" {:title "Welcome to MicroWorld" 
                               :content (util/md->html "/md/mw-ui.md")}))
 
 (defn world-page []
-  (layout/render "world.html" {:title "Watch your world grow" 
+  (layout/render "trusted-content.html" {:title "Watch your world grow" 
                                :content (html (world/render-world-table)) 
-                               :seconds (or (session/get :seconds) 5) 
+                               :pause (or (session/get :pause) 5) 
                                :maybe-refresh "refresh"}))
 
 (defn about-page []
-  (layout/render "about.html" {:title "About MicroWorld" :content (util/md->html "/md/about.md")}))
+  (layout/render "trusted-content.html" {:title "About MicroWorld" :content (util/md->html "/md/about.md")}))
 
 (defn list-states []
   (sort
@@ -28,8 +29,8 @@
 
 (defn docs-page []
   (layout/render "docs.html" {:title "Documentation"
-                              :parser (util/md->html "/md/mw-parser.md")
-                              :states (list-states)
+                              :parser (util/md->html "/md/mw-parser.md" )
+                              :states (util/list-resources "resources/public/img/tiles" #"([0-9a-z-_]+).png")
                               :components ["mw-engine" "mw-parser" "mw-ui"]}))
 
 (defroutes home-routes
@@ -37,5 +38,7 @@
   (GET "/about" [] (about-page))
   (GET "/docs"  [] (docs-page))
   (GET "/world"  [] (world-page))
+  (GET "/params" [] (params/params-page))
+  (POST "/params" request (params/params-page request))
   (GET "/rules" request (rules/rules-page request))
   (POST "/rules" request (rules/rules-page request)))
diff --git a/src/mw_ui/util.clj b/src/mw_ui/util.clj
index 0a41630..148dc26 100644
--- a/src/mw_ui/util.clj
+++ b/src/mw_ui/util.clj
@@ -8,3 +8,10 @@
   (->>
     (io/slurp-resource filename)
     (md/md-to-html-string)))
+
+(defn list-resources [directory pattern]
+  "List resource files matching `pattern` in `directory`."
+  (sort
+    (filter #(not (nil? %)) 
+            (map #(first (rest (re-matches pattern (.getName %))))
+                 (file-seq (clojure.java.io/file directory))))))
