diff --git a/dev/tests/network_http.lua b/dev/tests/network_http.lua
new file mode 100644
index 00000000..9bae830d
--- /dev/null
+++ b/dev/tests/network_http.lua
@@ -0,0 +1,8 @@
+local response_received = false
+
+network.get("https://api.github.com/repos/MihailRis/VoxelEngine-Cpp/releases/latest", function (s)
+    print(json.parse(s).name)
+    response_received = true
+end)
+
+app.sleep_until(function () return response_received end, nil, 10)
diff --git a/dev/tests/network_tcp.lua b/dev/tests/network_tcp.lua
new file mode 100644
index 00000000..eb6b1880
--- /dev/null
+++ b/dev/tests/network_tcp.lua
@@ -0,0 +1,45 @@
+for i=1,3 do
+    print(string.format("iteration %s", i + 1))
+    local text = ""
+    local complete = false
+
+    for j=1,100 do
+        text = text .. math.random(0, 9)
+    end
+
+    local server = network.tcp_open(7645, function (client)
+        print("client connected")
+        start_coroutine(function()
+            print("client-listener started")
+            local received_text = ""
+            while client:is_alive() and #received_text < #text do
+                local received = client:recv(512)
+                if received then
+                    received_text = received_text .. utf8.tostring(received)
+                    print(string.format("received %s byte(s) from client", #received))
+                end
+                coroutine.yield()
+            end
+            asserts.equals (text, received_text)
+            complete = true
+        end, "client-listener")
+    end)
+
+    network.tcp_connect("localhost", 7645, function (socket)
+        print("connected to server")
+        start_coroutine(function()
+            print("data-sender started")
+            local ptr = 1
+            while ptr <= #text do
+                local n = math.random(1, 20)
+                socket:send(string.sub(text, ptr, ptr + n - 1))
+                print(string.format("sent %s byte(s) to server", n))
+                ptr = ptr + n
+            end
+            socket:close()
+        end, "data-sender")
+    end)
+
+    app.sleep_until(function () return complete end, nil, 5)
+    server:close()
+end
diff --git a/res/layouts/pages/scripts.xml.lua b/res/layouts/pages/scripts.xml.lua
index 3529b3d2..dad0d1ff 100644
--- a/res/layouts/pages/scripts.xml.lua
+++ b/res/layouts/pages/scripts.xml.lua
@@ -13,9 +13,9 @@ end
 function refresh()
     document.list:clear()
     
-    local available = pack.get_available()
-    local infos = pack.get_info(available)
-    for _, name in ipairs(available) do
+    local allpacks = table.merge(pack.get_available(), pack.get_installed())
+    local infos = pack.get_info(allpacks)
+    for _, name in ipairs(allpacks) do
         local info = infos[name]
         local scripts_dir = info.path.."/scripts/app"
         if not file.exists(scripts_dir) then
diff --git a/res/modules/internal/asserts.lua b/res/modules/internal/asserts.lua
new file mode 100644
index 00000000..2317bb7c
--- /dev/null
+++ b/res/modules/internal/asserts.lua
@@ -0,0 +1,10 @@
+local this = {}
+
+function this.equals(expected, fact)
+    assert(fact == expected, string.format(
+        "(fact == expected) assertion failed\n  Expected: %s\n  Fact:     %s",
+        expected, fact
+    ))
+end
+
+return this
diff --git a/res/project_client.lua b/res/project_client.lua
index a1952c08..03c43a4b 100644
--- a/res/project_client.lua
+++ b/res/project_client.lua
@@ -23,4 +23,5 @@ function on_menu_setup()
     menubg = gui.root.menubg
     controller.resize_menu_bg()
     menu.page = "main"
+    menu.visible = true
 end
diff --git a/res/scripts/stdlib.lua b/res/scripts/stdlib.lua
index 2a0c0173..b07d9387 100644
--- a/res/scripts/stdlib.lua
+++ b/res/scripts/stdlib.lua
@@ -79,13 +79,20 @@ local function complete_app_lib(app)
         coroutine.yield()
     end
 
-    function app.sleep_until(predicate, max_ticks)
+    function app.sleep_until(predicate, max_ticks, max_time)
         max_ticks = max_ticks or 1e9
+        max_time = max_time or 1e9
         local ticks = 0
-        while ticks < max_ticks and not predicate() do
+        local start_time = os.clock()
+        while ticks < max_ticks and
+            os.clock() - start_time < max_time
+            and not predicate() do
             app.tick()
             ticks = ticks + 1
         end
+        if os.clock() - start_time >= max_time then
+            error("timeout")
+        end
         if ticks == max_ticks then
             error("max ticks exceed")
         end
@@ -174,6 +181,7 @@ if enable_experimental then
     require "core:internal/maths_inline"
 end
 
+asserts = require "core:internal/asserts"
 events = require "core:internal/events"
 
 function pack.unload(prefix)
@@ -531,15 +539,18 @@ function start_coroutine(chunk, name)
     local co = coroutine.create(function()
         local status, error = xpcall(chunk, function(err)
             local fullmsg = "error: "..string.match(err, ": (.+)").."\n"..debug.traceback()
-            gui.alert(fullmsg, function()
-                if world.is_open() then
-                    __vc_app.close_world()
-                else
-                    __vc_app.reset_content()
-                    menu:reset()
-                    menu.page = "main"
-                end
-            end)
+            
+            if hud then
+                gui.alert(fullmsg, function()
+                    if world.is_open() then
+                        __vc_app.close_world()
+                    else
+                        __vc_app.reset_content()
+                        menu:reset()
+                        menu.page = "main"
+                    end
+                end)
+            end
             return fullmsg
         end)
         if not status then
diff --git a/src/network/Network.cpp b/src/network/Network.cpp
index d60dcb67..b175a809 100644
--- a/src/network/Network.cpp
+++ b/src/network/Network.cpp
@@ -96,7 +96,7 @@ public:
             onResponse,
             onReject,
             maxSize,
-            false,
+            true,
             "",
             std::move(headers)};
         processRequest(std::move(request));
@@ -590,10 +590,12 @@ public:
         }
         int opt = 1;
         int flags = SO_REUSEADDR;
-#       ifndef _WIN32
+#       if !defined(_WIN32) && !defined(__APPLE__)
             flags |= SO_REUSEPORT;
 #       endif
         if (setsockopt(descriptor, SOL_SOCKET, flags, (const char*)&opt, sizeof(opt))) {
+            logger.error() << "setsockopt(SO_REUSEADDR) failed with errno: "
+             << errno << "(" << std::strerror(errno) << ")";
             closesocket(descriptor);
             throw std::runtime_error("setsockopt");
         }