diff --git a/packets.cpp b/packets.cpp
index 3787872..7a692a6 100644
--- a/packets.cpp
+++ b/packets.cpp
@@ -135,6 +135,21 @@ void packets::play::clientbound::ChatMessage::serialize(McDataStream &stream)
     stream.writeRawData(buffer.constData(), buffer.length());
 }
 
+void packets::play::clientbound::OpenWindow::serialize(McDataStream &stream)
+{
+    QByteArray buffer;
+    McDataStream tempStream(&buffer, QIODevice::WriteOnly);
+    tempStream.writeVar<qint32>(qint32(PacketType::OpenWindow));
+    tempStream << windowId;
+    tempStream.writeVar<QString>(windowType);
+    tempStream.writeVar<QString>(windowTitle);
+    tempStream << numberOfSlots;
+    if (entityId.has_value())
+        tempStream << *entityId;
+    stream.writeVar<qint32>(buffer.length());
+    stream.writeRawData(buffer.constData(), buffer.length());
+}
+
 void packets::play::clientbound::PluginMessage::serialize(McDataStream &stream)
 {
     QByteArray buffer;
diff --git a/packets.h b/packets.h
index 6c951f3..00d38f0 100644
--- a/packets.h
+++ b/packets.h
@@ -160,9 +160,9 @@ namespace packets {
         namespace clientbound {
             Q_NAMESPACE
 
-            enum class PacketType { SpawnMob = 0x03, ServerDifficulty = 0x0D, ChatMessage = 0x0E, PluginMessage = 0x19, Disconnect = 0x1B,
-                                    KeepAlive = 0x21, ChunkData = 0x22, JoinGame = 0x25, PlayerAbilities = 0x2E, PlayerPositionAndLook = 0x32,
-                                    SetExperience = 0x43, UpdateHealth = 0x44, SpawnPosition = 0x49 };
+            enum class PacketType { SpawnMob = 0x03, ServerDifficulty = 0x0D, ChatMessage = 0x0E, OpenWindow = 0x14, PluginMessage = 0x19,
+                                    Disconnect = 0x1B, KeepAlive = 0x21, ChunkData = 0x22, JoinGame = 0x25, PlayerAbilities = 0x2E,
+                                    PlayerPositionAndLook = 0x32, SetExperience = 0x43, UpdateHealth = 0x44, SpawnPosition = 0x49 };
             Q_ENUM_NS(PacketType)
 
             // does not work yet, client shows exception
@@ -197,6 +197,16 @@ namespace packets {
                 void serialize(McDataStream &stream);
             };
 
+            struct OpenWindow {
+                quint8 windowId;
+                QString windowType;
+                QString windowTitle;
+                quint8 numberOfSlots;
+                std::optional<qint32> entityId;
+
+                void serialize(McDataStream &stream);
+            };
+
             struct PluginMessage {
                 QString channel;
                 QByteArray data;
diff --git a/playclient.cpp b/playclient.cpp
index 0614102..63ffcae 100644
--- a/playclient.cpp
+++ b/playclient.cpp
@@ -106,12 +106,6 @@ void PlayClient::tick()
         m_lastKeepAliveSent = now;
     }
 
-    if (!m_lastChatMessage.isValid() || m_lastChatMessage.secsTo(now) >= 2)
-    {
-        sendChatMessage(ChatPart{.text=tr("Time chaged to %0").arg(QTime::currentTime().toString())}.toString());
-        m_lastChatMessage = now;
-    }
-
     if (!m_lastStats.isValid() || m_lastStats.msecsTo(now) >= 500)
     {
         {
@@ -131,17 +125,6 @@ void PlayClient::tick()
 
         m_lastStats = now;
     }
-
-    if (m_connectedSince.secsTo(now) >= 30)
-    {
-        packets::play::clientbound::Disconnect packet;
-        packet.reason = ChatPart{.text="Your trial has ended.",.bold=true}.toString();
-        packet.serialize(m_dataStream);
-        m_socket->flush();
-        m_dataStream.setDevice({});
-        new ClosedClient{std::move(m_socket), m_server};
-        deleteLater();
-    }
 }
 
 void PlayClient::sendChatMessage(const QString &message)
@@ -152,6 +135,17 @@ void PlayClient::sendChatMessage(const QString &message)
     packet.serialize(m_dataStream);
 }
 
+void PlayClient::disconnectClient(const QString &reason)
+{
+    packets::play::clientbound::Disconnect packet;
+    packet.reason = reason;
+    packet.serialize(m_dataStream);
+    m_socket->flush();
+    m_dataStream.setDevice({});
+    new ClosedClient{std::move(m_socket), m_server};
+    deleteLater();
+}
+
 void PlayClient::readyRead()
 {
     while(m_socket && m_socket->bytesAvailable())
@@ -193,9 +187,34 @@ void PlayClient::readPacket(packets::play::serverbound::PacketType type, const Q
         {
             serverbound::ChatMessage packet{dataStream};
             qDebug() << "message" << packet.message;
-            const auto formatted = ChatPart{.extra={ChatPart{.text=m_name,.color="red"},ChatPart{.text=": " + packet.message}}}.toString();
-            emit distributeChatMessage(formatted);
-            sendChatMessage(formatted);
+            if (packet.message.startsWith('/'))
+            {
+                auto args = packet.message.split(' ', Qt::SkipEmptyParts);
+                if (args.first() == "/help")
+                {
+                    sendChatMessage(ChatPart{.text=tr("Help:")}.toString());
+                    sendChatMessage(ChatPart{.text=tr(" * /help")}.toString());
+                    sendChatMessage(ChatPart{.text=tr(" * /disconnect")}.toString());
+                    sendChatMessage(ChatPart{.text=tr(" * /menu")}.toString());
+                }
+                else if (args.first() == "/disconnect")
+                {
+                    disconnectClient(ChatPart{.text="Your trial has ended.",.bold=true}.toString());
+                }
+                else if (args.first() == "/menu")
+                {
+                }
+                else
+                {
+                    sendChatMessage(ChatPart{.text=tr("Unknown command %0").arg(args.first()),.color="red"}.toString());
+                }
+            }
+            else
+            {
+                const auto formatted = ChatPart{.extra={ChatPart{.text=m_name,.color="red"},ChatPart{.text=": " + packet.message}}}.toString();
+                sendChatMessage(formatted);
+                emit distributeChatMessage(formatted);
+            }
         }
         break;
     }
diff --git a/playclient.h b/playclient.h
index 82126b4..d9e85db 100644
--- a/playclient.h
+++ b/playclient.h
@@ -25,6 +25,7 @@ signals:
 
 public slots:
     void sendChatMessage(const QString &message);
+    void disconnectClient(const QString &reason);
 
 private slots:
     void readyRead();
@@ -43,6 +44,4 @@ private:
     const QDateTime m_connectedSince{QDateTime::currentDateTime()};
     QDateTime m_lastKeepAliveSent;
     QDateTime m_lastKeepAliveReceived;
-    QDateTime m_lastChatMessage;
-    QDateTime m_lastStats;
 };
diff --git a/server.cpp b/server.cpp
index d3172c1..8839ab6 100644
--- a/server.cpp
+++ b/server.cpp
@@ -48,5 +48,4 @@ void Server::newConnection()
     auto connection = std::unique_ptr<QTcpSocket>(m_server.nextPendingConnection());
     if (connection)
         new HandshakingClient{std::move(connection), *this};
-    //clients.push_back();
 }