diff --git a/pytron_run/ai_manager/__init__.py b/pytron_run/ai_manager/__init__.py
deleted file mode 100644
index d2dd5e3..0000000
--- a/pytron_run/ai_manager/__init__.py
+++ /dev/null
@@ -1,4 +0,0 @@
-from os.path import dirname, basename, isfile
-import glob
-modules = glob.glob(dirname(__file__)+"/*/ai.py")
-__all__ = ['.'.join(f.split('.')[:-1]) for f in modules if isfile(f)]
diff --git a/pytron_run/ai_manager/dummy/ai.py b/pytron_run/ai_manager/dummy/ai.py
deleted file mode 100644
index 9cdba62..0000000
--- a/pytron_run/ai_manager/dummy/ai.py
+++ /dev/null
@@ -1,11 +0,0 @@
-"""An AI to try things"""
-
-from tron.player import Player, Direction
-
-class Ai(Player):
-    """" A basic AI"""
-    def __init__(self):
-        super(Ai, self).__init__()
-
-    def action(self, map, id):
-        return Direction.RIGHT
diff --git a/server.js b/server.js
index 51b4b45..0ea9bb3 100644
--- a/server.js
+++ b/server.js
@@ -127,6 +127,21 @@ function startServer() {
     });
 
     app.post('/upload-target', (req, res) => {
+
+        if (!req.body.name) {
+            res.render('error', {message: "You have to enter a name in the form"});
+            return;
+        }
+
+        if (req.body.name.indexOf('.') !== -1) {
+            res.render('error', {message: "The name of your AI can't contain dots"});
+        }
+
+        if (!req.files.archive) {
+            res.render('error', {message: "You have to send a ZIP archive"});
+            return;
+        }
+
         let path = pathtools.join(aisPath, req.body.name)
 
         try {
@@ -158,6 +173,8 @@ function startServer() {
         req.files.archive.mv(zipfile, (err) => {
             if (err != null) {
                 console.log(err);
+                res.render('error', {message: 'Unable to save the ZIP archive to the server'});
+                return;
             }
             fs.createReadStream(zipfile)
                 .pipe(unzip.Extract({path}))
@@ -170,7 +187,7 @@ function startServer() {
                     });
                 })
                 .on('error', () => {
-                    res.send('an error occured while extracting the archive')
+                    res.render('error', {message: 'Failed to unzip the archive'});
                 });
         });
     });
diff --git a/views/error.pug b/views/error.pug
new file mode 100644
index 0000000..0eaf81d
--- /dev/null
+++ b/views/error.pug
@@ -0,0 +1,8 @@
+extends base
+
+block content
+    section.section
+        .container
+            .message.is-danger
+                .message-header An error occured
+                .message-body= message
diff --git a/views/upload.pug b/views/upload.pug
index 3ba5ba1..9a2a90d 100644
--- a/views/upload.pug
+++ b/views/upload.pug
@@ -1,14 +1,42 @@
 extends base
+
 block content
     section.section
         .container
             .columns.is-centered
-                .column.is-narrow.is-desktop
+                .column.is-6.is-desktop
                     form(action="upload-target", method="POST", encType="multipart/form-data")
                         .field
                             label.label Name
+                            p.content.has-text-justified
+                                | This name will be the name you will see on
+                                | the leaderboard.  It also corresponds to the
+                                | name of the module your AI will be on the
+                                | server.
+                            p.content.has-text-justified
+                                | You can use an already exisiting name to
+                                | replace it with a new version of your AI.
+                            p.content.has-text-justified
+                                | You could also erase other people's AI, but
+                                | please, don't do it, because I would be sad
+                                | 😢
                             input.input(type="text", name="name", placeholder="Name of your AI")
                         .field
+                            label.label Archive
+                            p.content.has-text-justified
+                                | The archive to upload needs to contain a file
+                                | named <code>ai.py</code> which must contain a
+                                | class named <code>Ai</code> which must contain
+                                | a constructor that takes no arguments (other
+                                | than self or optional arguments).
+                            p.content.has-text-justified
+                                | It may also contain more files, such as
+                                | binary files with neural network weights, or
+                                | such as other python modules.
+                            p.content.has-text-justified
+                                | Please note that this archive must not
+                                | contain a directory, it must only contain the
+                                | files.
                             .file.has-name
                                 label.file-label
                                     input.file-input(type="file", name="archive")
@@ -17,6 +45,6 @@ block content
                                             i.fas.fa-upload
                                         span.file-label Choose a file…
                                     span.file-name
-                        .control
-                            button.button.is-link Submit
+                        .field
+                            input.button.is-link(type="submit", value="Submit")