diff --git a/account.php b/account.php
index 358fb2b..3f238c4 100644
--- a/account.php
+++ b/account.php
@@ -25,6 +25,7 @@ $user = SessionManager::get();
         <ul>
             <li><a href="index.php">Home</a></li>
             <li><a href="game.php">Game</a></li>
+            <li><a href="leaderboard.php">Leaderboard</a></li>
             <li class="current">
                 <a href="#">Account</a>
                 <ul>
diff --git a/database.sql b/database.sql
index 2160a61..27d0a9d 100644
--- a/database.sql
+++ b/database.sql
@@ -9,8 +9,8 @@ flush privileges;
 use mar;
 
 -- create tables
-create table mar_user
-(
+create table mar_user (
+
   username varchar(20) not null
     primary key,
   password tinytext not null,
@@ -18,3 +18,13 @@ create table mar_user
   tokenTime datetime null,
   floppyData mediumblob null
 );
+
+create table mar_vault_clear (
+  id INTEGER AUTO_INCREMENT PRIMARY KEY,
+  username VARCHAR(20) NOT NULL,
+  clear_time INTEGER NOT NULL,
+  vault_id VARCHAR(20),
+
+  FOREIGN KEY (username) REFERENCES mar_user(username),
+  CONSTRAINT mar_vault_clear_uc_1 UNIQUE (username, vault_id)
+)
diff --git a/game.php b/game.php
index 9202576..9adc94e 100644
--- a/game.php
+++ b/game.php
@@ -50,6 +50,7 @@ if (isset($user)) {
         <ul>
             <li><a href="index.php">Home</a></li>
             <li class="current"><a href="servers.php">Play</a></li>
+            <li><a href="leaderboard.php">Leaderboard</a></li>
             <li>
                 <a href="#">Account</a>
                 <ul>
diff --git a/index.php b/index.php
index 806cf7d..e980728 100644
--- a/index.php
+++ b/index.php
@@ -39,6 +39,7 @@ $user = SessionManager::get();
     <ul>
         <li class="current"><a href="index.php">Home</a></li>
         <li><a href="servers.php">Play</a></li>
+        <li><a href="leaderboard.php">Leaderboard</a></li>
         <li>
             <a href="#">Account</a>
             <ul>
diff --git a/leaderboard.php b/leaderboard.php
new file mode 100644
index 0000000..e7f2722
--- /dev/null
+++ b/leaderboard.php
@@ -0,0 +1,151 @@
+<?php
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
+
+include_once "include/SessionManager.php";
+include_once "include/SqlConnection.php";
+
+$user = SessionManager::get();
+?>
+
+<!DOCTYPE HTML>
+<html>
+<head>
+    <title>Server List - Much Assembly Required</title>
+    <meta charset="utf-8"/>
+    <meta name="description"
+          content="Much Assembly Required is a game where you can program your robot's microprocessor in x86-like assembly language in a procedurally generated universe">
+    <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <!--[if lte IE 8]>
+    <script src="assets/js/ie/html5shiv.js"></script><![endif]-->
+    <link rel="stylesheet" href="assets/css/main.min.css"/>
+    <!--[if lte IE 8]>
+    <link rel="stylesheet" href="assets/css/ie8.min.css"/><![endif]-->
+
+    <style>
+
+        @font-face {
+            font-family: 'fixedsys';
+            src: url("assets/fonts/FSEX301-L2.ttf");
+        }
+
+        table {
+            margin: 0 0 2.25em 0;
+            width: 100%;
+            border-collapse: collapse;
+            border-spacing: 0;
+        }
+
+        table tbody tr {
+            border: solid 2px #f4f4f4;
+            border-left: 0;
+            border-right: 0;
+        }
+
+        table tbody tr:nth-child(2n + 1) {
+            background-color: #fafafa;
+        }
+
+        table td {
+            padding: 0.75em 0.75em;
+        }
+
+        table th {
+            color: #777;
+            font-size: 0.9em;
+            font-weight: 700;
+            padding: 0 0.75em 0.75em 0.75em;
+            text-align: left;
+        }
+
+        table thead {
+            border-bottom: solid 4px #e4e4e4;
+        }
+
+        table tfoot {
+            border-top: solid 4px #e4e4e4;
+        }
+
+    </style>
+
+</head>
+<body class="homepage">
+
+<!-- Nav -->
+<nav id="nav">
+    <ul>
+        <li><a href="index.php">Home</a></li>
+        <li><a href="servers.php">Play</a></li>
+        <li class="current"><a href="#">Leaderboard</a></li>
+        <li>
+            <a href="#">Account</a>
+            <ul>
+                <?php if ($user) { ?>
+                    <li><a href="account.php"><?php echo $user["username"] ?></a></li>
+                    <li><a href="logout.re.php">Logout</a></li>
+                <?php } else { ?>
+                    <li><a href="login.php">login</a></li>
+                <?php } ?>
+            </ul>
+        </li>
+    </ul>
+</nav>
+
+<div id="page-wrapper">
+
+    <?php // include "header.inc.html" ?>
+
+    <!-- Main -->
+    <div id="main-wrapper">
+        <div id="main" class="container">
+            <div class="12u">
+
+                <h2>Leaderboard</h2>
+
+                <table id="serverList">
+                    <thead>
+                    <tr>
+                        <th>Player</th>
+                        <th>Completed vaults</th>
+                    </tr>
+                    </thead>
+                    <tbody>
+                    <?php
+
+                    $conn = new SqlConnection();
+                    $stmt = $conn->prepare("SELECT username, count(username) as clears FROM mar_vault_clear GROUP BY username ORDER BY clears DESC ");
+                    $stmt->execute();
+                    $users = $stmt->fetchAll();
+
+                    foreach ($users as $user) {
+                        echo "<tr>";
+                        echo "<td>$user[0]</td>";
+                        echo "<td>$user[1]</td>";
+
+                        echo "</tr>";
+                    }
+                    ?>
+                    </tbody>
+
+                </table>
+
+            </div>
+        </div>
+    </div>
+
+    <?php //include "footer.inc.html" ?>
+
+</div>
+
+<!-- Scripts -->
+<script src="assets/js/jquery.min.js"></script>
+<script src="assets/js/jquery.dropotron.min.js"></script>
+<script src="assets/js/skel.min.js"></script>
+<script src="assets/js/util.min.js"></script>
+<!--[if lte IE 8]>
+<script src="assets/js/ie/respond.min.js"></script><![endif]-->
+<script src="assets/js/main.min.js"></script>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/login.php b/login.php
index 7244ff3..9d42f53 100644
--- a/login.php
+++ b/login.php
@@ -34,6 +34,7 @@ $user = SessionManager::get();
         <ul>
             <li><a href="index.php">Home</a></li>
             <li><a href="servers.php">Play</a></li>
+            <li><a href="leaderboard.php">Leaderboard</a></li>
             <li class="current">
                 <a href="#">Account</a>
                 <ul>
diff --git a/mar/app.js b/mar/app.js
index 011006c..cb75827 100644
--- a/mar/app.js
+++ b/mar/app.js
@@ -368,12 +368,12 @@ var Debug = /** @class */ (function () {
     }
     Debug.setTileAt = function (x, y, newTile) {
         mar.client.sendDebugCommand({ t: "debug", command: "setTileAt", x: x, y: y, newTile: newTile,
-            worldX: mar.client.worldX, worldY: mar.client.worldY });
+            worldX: mar.client.worldX, worldY: mar.client.worldY, dimension: mar.client.dimension });
         mar.client.requestTerrain(); //Reload terrain
     };
     Debug.createWorld = function (x, y, dimension) {
         mar.client.sendDebugCommand({ t: "debug", command: "createWorld", worldX: x, worldY: y, dimension: dimension });
-        mar.client.requestTerrain(); //Reload terrain
+        window.setTimeout(mar.client.requestTerrain, 250);
     };
     Debug.createWorldHex = function (x, y, dimension) {
         mar.client.sendDebugCommand({ t: "debug", command: "createWorld",
@@ -420,6 +420,9 @@ var Debug = /** @class */ (function () {
         mar.client.sendDebugCommand({ t: "debug", command: "spawnObj", data: data,
             worldX: mar.client.worldX, worldY: mar.client.worldY, dimension: mar.client.dimension });
     };
+    Debug.comPortMsg = function (objectId, message) {
+        mar.client.sendDebugCommand({ t: "debug", command: "comPortMsg", objectId: objectId, message: message });
+    };
     return Debug;
 }());
 DEBUG = false; // todo remove
diff --git a/mar/mar.ts b/mar/mar.ts
index d01e577..9b6ccb9 100644
--- a/mar/mar.ts
+++ b/mar/mar.ts
@@ -115,14 +115,14 @@ class Debug {
 
     public static setTileAt(x, y, newTile) {
         mar.client.sendDebugCommand({t:"debug", command: "setTileAt", x: x, y: y, newTile: newTile,
-            worldX: mar.client.worldX, worldY: mar.client.worldY});
+            worldX: mar.client.worldX, worldY: mar.client.worldY, dimension: mar.client.dimension});
 
         mar.client.requestTerrain(); //Reload terrain
     }
 
     public static createWorld(x, y, dimension) {
         mar.client.sendDebugCommand({t:"debug", command: "createWorld", worldX: x, worldY: y, dimension:dimension});
-        mar.client.requestTerrain(); //Reload terrain
+        window.setTimeout(mar.client.requestTerrain, 250)
     }
 
     public static createWorldHex(x, y, dimension) {
@@ -180,6 +180,10 @@ class Debug {
             worldX: mar.client.worldX, worldY: mar.client.worldY, dimension: mar.client.dimension});
     }
 
+    public static comPortMsg(objectId, message) {
+        mar.client.sendDebugCommand({t:"debug", command: "comPortMsg", objectId: objectId, message: message});
+    }
+
 }
 
 DEBUG = false; // todo remove
diff --git a/servers.php b/servers.php
index 69be47d..0e190ae 100644
--- a/servers.php
+++ b/servers.php
@@ -29,6 +29,43 @@ $user = SessionManager::get();
             src: url("assets/fonts/FSEX301-L2.ttf");
         }
 
+        table {
+            margin: 0 0 2.25em 0;
+            width: 100%;
+            border-collapse: collapse;
+            border-spacing: 0;
+        }
+
+        table tbody tr {
+            border: solid 2px #f4f4f4;
+            border-left: 0;
+            border-right: 0;
+        }
+
+        table tbody tr:nth-child(2n + 1) {
+            background-color: #fafafa;
+        }
+
+        table td {
+            padding: 0.75em 0.75em;
+        }
+
+        table th {
+            color: #777;
+            font-size: 0.9em;
+            font-weight: 700;
+            padding: 0 0.75em 0.75em 0.75em;
+            text-align: left;
+        }
+
+        table thead {
+            border-bottom: solid 4px #e4e4e4;
+        }
+
+        table tfoot {
+            border-top: solid 4px #e4e4e4;
+        }
+
     </style>
 
 </head>
@@ -38,7 +75,8 @@ $user = SessionManager::get();
 <nav id="nav">
     <ul>
         <li><a href="index.php">Home</a></li>
-        <li class="current"><a href="servers.php">Play</a></li>
+        <li class="current"><a href="#">Play</a></li>
+        <li><a href="leaderboard.php">Leaderboard</a></li>
         <li>
             <a href="#">Account</a>
             <ul>
@@ -62,57 +100,16 @@ $user = SessionManager::get();
         <div id="main" class="container">
             <div class="12u">
 
-
-                <style>
-
-                    table {
-                        margin: 0 0 2.25em 0;
-                        width: 100%;
-                        border-collapse: collapse;
-                        border-spacing: 0;
-                    }
-
-                    table tbody tr {
-                        border: solid 2px #f4f4f4;
-                        border-left: 0;
-                        border-right: 0;
-                    }
-
-                    table tbody tr:nth-child(2n + 1) {
-                        background-color: #fafafa;
-                    }
-
-                    table td {
-                        padding: 0.75em 0.75em;
-                    }
-
-                    table th {
-                        color: #777;
-                        font-size: 0.9em;
-                        font-weight: 700;
-                        padding: 0 0.75em 0.75em 0.75em;
-                        text-align: left;
-                    }
-
-                    table thead {
-                        border-bottom: solid 4px #e4e4e4;
-                    }
-
-                    table tfoot {
-                        border-top: solid 4px #e4e4e4;
-                    }
-
-                </style>
-
-                <h2>Server list</h2>
+                <h2>Server List</h2>
 
                 <table id="serverList">
+                    <thead>
                     <tr>
                         <th>Name</th>
                         <th>Description</th>
                     </tr>
-
-
+                    </thead>
+                    <tbody>
                     <?php
                     foreach (SERVER_LIST as $server) {
                         echo "<tr>";
@@ -123,6 +120,8 @@ $user = SessionManager::get();
 
                     }
                     ?>
+                    </tbody>
+
                 </table>
 
             </div>
