diff --git a/Fk/Pages/Lobby.qml b/Fk/Pages/Lobby.qml
index ab969a59..f67b022c 100644
--- a/Fk/Pages/Lobby.qml
+++ b/Fk/Pages/Lobby.qml
@@ -203,8 +203,8 @@ Item {
     icon.name: "application-exit"
     onClicked: {
       toast.show("Goodbye.");
-      Backend.quitLobby();
       mainStack.pop();
+      Backend.quitLobby();
     }
   }
 
diff --git a/lua/server/events/gameflow.lua b/lua/server/events/gameflow.lua
index c1f948f9..fe0e1218 100644
--- a/lua/server/events/gameflow.lua
+++ b/lua/server/events/gameflow.lua
@@ -47,6 +47,16 @@ local function discardInit(room, player)
   end
 end
 
+local function checkNoHuman(room)
+  for _, p in ipairs(room.players) do
+    -- TODO: trust
+    if p.serverplayer:getStateString() == "online" then
+      return
+    end
+  end
+  room:gameOver("")
+end
+
 GameEvent.functions[GameEvent.DrawInitial] = function(self)
   local room = self.room
 
@@ -98,6 +108,8 @@ GameEvent.functions[GameEvent.DrawInitial] = function(self)
       break
     end
 
+    checkNoHuman(room)
+
     coroutine.yield("__handleRequest", (remainTime - elapsed) * 1000)
   end
 
diff --git a/lua/server/request.lua b/lua/server/request.lua
index a7469872..afa85f03 100644
--- a/lua/server/request.lua
+++ b/lua/server/request.lua
@@ -10,6 +10,7 @@ local function tellRoomToObserver(self, player)
   player:doNotify("EnterRoom", json.encode{
     #self.players, self.timeout, self.settings
   })
+  player:doNotify("StartGame", "")
 
   -- send player data
   for _, p in ipairs(self:getOtherPlayers(observee, true, true)) do
diff --git a/lua/server/serverplayer.lua b/lua/server/serverplayer.lua
index 674d96fa..7eca40af 100644
--- a/lua/server/serverplayer.lua
+++ b/lua/server/serverplayer.lua
@@ -273,6 +273,7 @@ function ServerPlayer:reconnect()
   self:doNotify("EnterRoom", json.encode{
     #room.players, room.timeout, room.settings,
   })
+  self:doNotify("StartGame", "")
   room:notifyProperty(self, self, "role")
 
   -- send player data
diff --git a/src/client/client.cpp b/src/client/client.cpp
index 1ca84694..7b0afc9e 100644
--- a/src/client/client.cpp
+++ b/src/client/client.cpp
@@ -8,6 +8,8 @@
 Client *ClientInstance;
 ClientPlayer *Self;
 
+static ClientPlayer dummyPlayer(0, nullptr);
+
 Client::Client(QObject *parent) : QObject(parent), callback(0) {
   ClientInstance = this;
   Self = new ClientPlayer(0, this);
@@ -27,6 +29,9 @@ Client::Client(QObject *parent) : QObject(parent), callback(0) {
 
 Client::~Client() {
   ClientInstance = nullptr;
+  // Self->deleteLater();
+  Self = nullptr;
+  Backend->getEngine()->rootContext()->setContextProperty("Self", &dummyPlayer);
   lua_close(L);
   router->getSocket()->disconnectFromHost();
   router->getSocket()->deleteLater();
diff --git a/src/core/util.cpp b/src/core/util.cpp
index bbe061bc..a7f6e2be 100644
--- a/src/core/util.cpp
+++ b/src/core/util.cpp
@@ -215,8 +215,6 @@ QString calcFileMD5() {
   writeDirMD5(flist, "packages", "*.qml");
   writeDirMD5(flist, "packages", "*.js");
   writeDirMD5(flist, "lua", "*.lua");
-  writeDirMD5(flist, "qml", "*.qml");
-  writeDirMD5(flist, "qml", "*.js");
   writeDirMD5(flist, "Fk", "*.qml");
   writeDirMD5(flist, "Fk", "*.js");
 
diff --git a/src/main.cpp b/src/main.cpp
index f55ee6d2..0be1ba0e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -85,12 +85,12 @@ static void prepareForLinux() {
   const char *home = getenv("HOME");
   if (!strcmp(buf, "/usr/bin/FreeKill")) {
     system("mkdir -p ~/.local/share/FreeKill");
-    installFkAssets("/usr/share/FreeKill", QString("%1/.local/share").arg(home));
+    installFkAssets("/usr/share/FreeKill", QString("%1/.local/share/FreeKill").arg(home));
     chdir(home);
     chdir(".local/share/FreeKill");
   } else if (!strcmp(buf, "/usr/local/bin/FreeKill")) {
     system("mkdir -p ~/.local/share/FreeKill");
-    installFkAssets("/usr/local/share/FreeKill", QString("%1/.local/share").arg(home));
+    installFkAssets("/usr/local/share/FreeKill", QString("%1/.local/share/FreeKill").arg(home));
     chdir(home);
     chdir(".local/share/FreeKill");
   }
diff --git a/src/server/server.cpp b/src/server/server.cpp
index 3ac18bf8..3aa87567 100644
--- a/src/server/server.cpp
+++ b/src/server/server.cpp
@@ -52,11 +52,11 @@ Server::Server(QObject *parent) : QObject(parent) {
         }
       }
 
-      for (int i = 0; i < 10; i++) {
+      for (int i = 0; i < 20; i++) {
         if (!this->isListening) {
           return;
         }
-        QThread::sleep(2);
+        QThread::sleep(1);
       }
 
       foreach (auto p, this->players.values()) {
@@ -75,6 +75,12 @@ Server::~Server() {
   isListening = false;
   ServerInstance = nullptr;
   m_lobby->deleteLater();
+  foreach (auto room, idle_rooms) {
+    room->deleteLater();
+  }
+  foreach (auto room, rooms) {
+    room->deleteLater();
+  }
   sqlite3_close(db);
   RSA_free(rsa);
 }
@@ -390,13 +396,13 @@ void Server::handleNameAndPassword(ClientSocket *client, const QString &name,
 
 void Server::onRoomAbandoned() {
   Room *room = qobject_cast<Room *>(sender());
+  if (room->isRunning()) {
+    room->wait();
+  }
   room->gameOver();
   rooms.remove(room->getId());
   updateRoomList();
   // room->deleteLater();
-  if (room->isRunning()) {
-    room->wait();
-  }
   idle_rooms.push(room);
 #ifdef QT_DEBUG
   qDebug() << rooms.size() << "running room(s)," << idle_rooms.size()
diff --git a/src/ui/qmlbackend.cpp b/src/ui/qmlbackend.cpp
index 894510ad..00fbb356 100644
--- a/src/ui/qmlbackend.cpp
+++ b/src/ui/qmlbackend.cpp
@@ -108,9 +108,9 @@ void QmlBackend::joinServer(QString address) {
 
 void QmlBackend::quitLobby() {
   if (ClientInstance)
-    delete ClientInstance;
-  // if (ServerInstance)
-  //   delete ServerInstance;
+    ClientInstance->deleteLater();
+  if (ServerInstance)
+    ServerInstance->deleteLater();
 }
 
 void QmlBackend::emitNotifyUI(const QString &command, const QString &jsonData) {
@@ -120,6 +120,7 @@ void QmlBackend::emitNotifyUI(const QString &command, const QString &jsonData) {
 QString QmlBackend::translate(const QString &src) {
   if (!ClientInstance)
     return src;
+
   lua_State *L = ClientInstance->getLuaState();
   lua_getglobal(L, "Translate");
   auto bytes = src.toUtf8();
@@ -172,6 +173,7 @@ void QmlBackend::pushLuaValue(lua_State *L, QVariant v) {
 
 QString QmlBackend::callLuaFunction(const QString &func_name,
                                     QVariantList params) {
+  if (!ClientInstance) return "{}";
   lua_State *L = ClientInstance->getLuaState();
   lua_getglobal(L, func_name.toLatin1().data());