diff --git a/xurfer/ecs.lua b/xurfer/ecs.lua
index 131318d..364e754 100644
--- a/xurfer/ecs.lua
+++ b/xurfer/ecs.lua
@@ -30,4 +30,14 @@ ecs.clear = function()
   api.world.commit()
 end
 
+ecs.extension = {
+  name = "ecs",
+  enabled = true,
+  index = 300,
+  init = function(api) ecs.init(api) end,
+  draw = function(pass)
+    ecs.update( api.world, pass, ecs.filterDraw )
+  end
+}
+
 return ecs
diff --git a/xurfer/ext/gazecontrol/main.lua b/xurfer/ext/gazecontrol/main.lua
index 7902364..941cc0d 100644
--- a/xurfer/ext/gazecontrol/main.lua
+++ b/xurfer/ext/gazecontrol/main.lua
@@ -5,49 +5,82 @@ local gctl
 
 gctl = {
 
-  name = "gctl",
-  enabled   = true,
+  name = "gazecontrol",
+  enabled   = (lovr ~= nil),
+  index     = api.ext.max * 0.9, -- important: render last! (renderOrder)
   texture   = {},
   material  = nil,
   dtmax     = 1,
   dt        = 0,
+  visor     = {
+    rotate = { x = 0, y = 0, z = 0},
+    scaleTo = 0.1,
+    scale   = 0.1,
+    scaleSpeed = 0.005,
+    walkingSpeed = 2,
+    texture = false,
+    textures = {}
+  },
 
   init = function() 
     --lovr.mouse.setRelativeMode(true)
     gctl.initVisor()
     gctl.extendECS()
+    api.player.matrix = lovr.math.newMat4()
   end,
 
 
-  load = function()
-    gctl.texture.idle = lovr.graphics.newTexture("ext/gazecontrol/reticle_idle.png")
-  end,
-
   initVisor = function()
-    -- add visor object 
-    gctl.visor = {
-      rotate = { x = 0, y = 0, z = 0},
-      scale  = 0.1,
-      texture = gctl.texture.idle
-    }
+    local visor = gctl.visor
+    visor.textures.idle = lovr.graphics.newTexture("ext/gazecontrol/reticle_idle.png")
+    visor.textures.hover = lovr.graphics.newTexture("ext/gazecontrol/reticle_hover.png")
+    visor.texture = visor.textures.idle
+  end,
+
+  update = function(dt, input)
+    local visor = gctl.visor
+    if input.pointer.hover then 
+      visor.texture = visor.textures.hover 
+      if visor.scale == visor.scaleTo then 
+        visor.scale   = 0.05
+      end
+    else
+      visor.texture = visor.textures.idle 
+      visor.scale   = visor.scaleTo 
+    end
+
+    if input.pointer.wheel then -- move forward/backward via scrollwheel
+      print( input.pointer.wheel.y)
+      local direction = vector(lovr.headset.getDirection('head'))
+      if not api.player.flying then direction = vector(direction.x, 0, direction.z) end
+      -- move forward/backward via scrollwheel
+      api.player.matrix:translate(direction * (input.pointer.wheel.y * visor.walkingSpeed) )
+    end
   end,
 
   draw = function(pass,dt) 
     -- *TODO* render this last (as it needs to be rendered after skybox & floor)
-    local posx, posy, posz = lovr.headset.getPosition('head')
+    local pos    = vector( lovr.headset.getPosition('head') ) + vector( api.player.matrix:getPosition() )
     local dirx, diry, dirz = lovr.headset.getDirection('head')
     local distance = 1
-    local x = posx + distance * dirx
-    local y = posy + distance * diry
-    local z = posz + distance * dirz
+    local x = pos.x + distance * dirx
+    local y = pos.y + distance * diry
+    local z = pos.z + distance * dirz
     local angle, ax, ay, az = lovr.headset.getOrientation(device)
-    local rot   = gctl.visor.rotate
-    local scale = gctl.visor.scale
-    pass:setMaterial(gctl.texture.idle)
-    pass:setShader() --'unlit')
-    pass:setBlendMode('alpha')
-    pass:setColor(1, 1, 1)
+    local visor = gctl.visor
+    local rot   = visor.rotate
+    local scale = visor.scale
+    if scale < visor.scaleTo then 
+      scale = scale + visor.scaleSpeed 
+      visor.scale = scale
+    end
+    pass:setMaterial(visor.texture)
+    pass:setColor(1, 1, 1, 1)
     pass:setCullMode('back')
+    --pass:setFaceCull()
+    --pass:setDepthWrite(true)
+    pass:setBlendMode("alpha", "alphamultiply")
+    --pass:setColorWrite(true)
     pass:plane(x, y, z, scale, scale, angle, ax, ay, az)
   end,
 
diff --git a/xurfer/ext/gazecontrol/reticle_hover.png b/xurfer/ext/gazecontrol/reticle_hover.png
new file mode 100644
index 0000000..f1fb1b3
Binary files /dev/null and b/xurfer/ext/gazecontrol/reticle_hover.png differ
diff --git a/xurfer/ext/gazecontrol/reticle_idle.png b/xurfer/ext/gazecontrol/reticle_idle.png
index f1fb1b3..36e0040 100644
Binary files a/xurfer/ext/gazecontrol/reticle_idle.png and b/xurfer/ext/gazecontrol/reticle_idle.png differ
diff --git a/xurfer/ext/skeleton/main.lua b/xurfer/ext/skeleton/main.lua
index 4137ef2..f189739 100644
--- a/xurfer/ext/skeleton/main.lua
+++ b/xurfer/ext/skeleton/main.lua
@@ -9,11 +9,9 @@ return {
     --api.ext.skeleton.extendECS()
   end,
 
-  update = function(dt) end,
-
-  load = function() end,
-
-  draw = function(pass,dt) end,
+  update = function(dt,input) end,
+  load   = function()         end,
+  draw   = function(pass,dt)  end,
 
   -- ECS API docs: https://bakpakin.github.io/tiny-ecs/doc
   extendECS = function()
diff --git a/xurfer/ext/startupscene/main.lua b/xurfer/ext/startupscene/main.lua
index a4f3e76..1d53077 100644
--- a/xurfer/ext/startupscene/main.lua
+++ b/xurfer/ext/startupscene/main.lua
@@ -5,6 +5,7 @@ local shader
 return {
   name = "startupscene",
   enabled = (lovr ~= nil),
+  index = api.ext.max * 0.1,
 
   init = function() end,
 
@@ -51,13 +52,15 @@ return {
 
         pass:setColor(1, 1, 1)
         pass:setMaterial(envTex)
+        pass:setDepthWrite(false)
         pass:draw(envTex, 0, 0, 0, 512, math.pi * 0.5, 1, 0, 0)
 
         -- floor
-        --pass:setMaterial()
+        pass:setMaterial()
+        pass:setDepthWrite(true)
         pass:setShader()
-        pass:setCullMode('front')
-        pass:setBlendMode('alpha')
+        --pass:setCullMode('front')
+        --pass:setBlendMode('alpha')
         pass:setMaterial()
         pass:setColor(0.8,0.8,0.8,1)
         pass:plane(0, 0, 0, 500, 500, math.pi * 0.5, 1, 0, 0, "fill", 5, 5)
diff --git a/xurfer/main.lua b/xurfer/main.lua
index 168d96c..659b026 100755
--- a/xurfer/main.lua
+++ b/xurfer/main.lua
@@ -31,7 +31,10 @@ api = {
   ecs      = ecs,
   world    = ecs.world(),
   protocol = {},
+  player   = { x = 0, y = 0, z = 0, ox = 0, oy = 1, oz = 0, oangle = 0, flying = true },
   ext      = { -- all extensions are loaded here from disk at runtime
+    ecs    = ecs.extension,
+    max    = 10000, -- max plugins (used for sorting)
     exec   = function(...) util.exec(api.ext,...) end -- util function to call func on each extension 
   },
   i = 1
@@ -39,14 +42,11 @@ api = {
 
 api = util.merge( api, runtime.api ) -- overlay api onto lovr/love-compatible runtime api
 
-require( runtime.path .. "/main")
-  
 util.loaddir( "ext",   api, api.ext )
-util.loaddir( "media", api, api.media )
-
-ecs.init(api)
-api.ext.exec('init')
+require( runtime.path .. "/main")
 
+api.ext.exec('init', api)
+  
 -- load urls passed on the cli
 foreach( arg, function(k,uri) 
   if uri:find(".") and k ~= 0 and k ~= -1 then 
diff --git a/xurfer/runtime/lovr/main.lua b/xurfer/runtime/lovr/main.lua
index b2bf969..5e70354 100644
--- a/xurfer/runtime/lovr/main.lua
+++ b/xurfer/runtime/lovr/main.lua
@@ -28,9 +28,30 @@ local ecs = api.ecs
 ecs.filterDraw   = ecs.requireAll('drawthread')
 ecs.filterUpdate = ecs.requireAll('updatethread')
 
+-- sort drawcalls of extensions
+api.ext.lovr = {
+  drawcalls = {},
+  enabled = true,
+  name = "lovr",
+  index = api.ext.max-1,
+  init = function()
+    api.ext.lovr.sortDrawCalls()
+  end,
+
+  sortDrawCalls = function()
+    local drawcalls = api.ext.lovr.drawcalls
+    foreach( api.ext, function(k,v)
+      if type(v) == 'table' and v.draw ~= nil then
+        table.insert(drawcalls, v)
+      end
+    end)
+    table.sort( drawcalls, function(a,b) return a.index < b.index end)
+  end
+}
+
 
 -- ecs systems
-local interactionsUpdater
+local interactions
 
 --- @type Texture
 local envTex
@@ -40,8 +61,7 @@ local mainWindow
 
 function lovr.load()
     if launch.mode == "desktop" then
-        backend.mouse = require "lib.lovr-mouse"
-
+        --backend.mouse = require "lib.lovr-mouse"
         lovr.system.setKeyRepeat(true)
     end
 
@@ -50,7 +70,10 @@ function lovr.load()
     api.ext.exec("load")
 
     if iui.idiom == "vr" then
-        lovr.headset.setPassthrough("opaque")
+        local modes = lovr.headset.getPassthroughModes()
+        local mode  = "opaque"
+        if modes.blend then mode = "blend" end
+        lovr.headset.setPassthrough( mode )
 
         mainWindow = backend.worldWindow.new()
         api.mainWindow = mainWindow
@@ -66,7 +89,7 @@ function lovr.update(dt)
         -- In desktop mode, we use IUI's standard window API to fill the screen.
         iui.beginWindow(lovr.system.getWindowDimensions())
 
-        api.ext.exec("update", dt)
+        api.ext.exec("update", dt, interactions.event )
 
         iui.endWindow()
 
@@ -76,7 +99,7 @@ function lovr.update(dt)
         if mainWindow:beginFrame() then
             iui.beginWindow(mainWindow.w, mainWindow.h)
 
-            api.ext.exec("update", dt)
+            api.ext.exec("update", dt, interactions.event )
 
             iui.endWindow()
 
@@ -88,6 +111,10 @@ function lovr.update(dt)
 end
 
 function lovr.draw(pass)
+    --api.player.matrix:setPosition( api.player.x, api.player.y, api.player.z )
+    --api.player.matrix.setOrientation( api.player.x, api.player.y, api.player.z )
+    pass:transform(mat4(api.player.matrix):invert())
+
     if iui.idiom == "desktop" then
         backend.graphics.pass = pass
 
@@ -97,27 +124,28 @@ function lovr.draw(pass)
       pass:setClear(0.2, 0.2, 0.2)
     end
 
-    api.ext.exec("draw",pass)
-    ecs.update( api.world, pass, ecs.filterDraw )
+    -- call draw() function of extensions (sorted by .index)
+    foreach( api.ext.lovr.drawcalls, function(k,ext) ext.draw(pass) end)
 
-     -- Dot
-    if interactionsUpdater.selectedBox then
-      pass:setColor(0, 0, 1)
-      pass:sphere( interactionsUpdater.hitpoint, .01)
-    end
-    
-    -- Laser pointers
-    local hands = {"left","right"}
-    foreach( hands, function(k,side)
-      local hand = vec3(lovr.headset.getPosition('hand/' .. side .. '/point'))
-      local direction = quat(lovr.headset.getOrientation('hand/' .. side .. '/point')):direction()
-      pass:setColor(1, 1, 1)
-      pass:line(hand, interactionsUpdater.selectedBox and interactionsUpdater.hitpoint or (hand + direction * 50))
-    end)
 
-    if api.mainWindow then
-      api.mainWindow:draw(pass)
-    end
+    -- -- Dot
+    --if interactions.selectedBox then
+    --  pass:setColor(0, 0, 1)
+    --  pass:sphere( interactions.hitpoint, .01)
+    --end
+    --
+    ---- Laser pointers
+    --local hands = {"left","right"}
+    --foreach( hands, function(k,side)
+    --  local hand = vec3(lovr.headset.getPosition('hand/' .. side .. '/point'))
+    --  local direction = quat(lovr.headset.getOrientation('hand/' .. side .. '/point')):direction()
+    --  pass:setColor(1, 1, 1)
+    --  pass:line(hand, interactions.selectedBox and interactions.hitpoint or (hand + direction * 50))
+    --end)
+
+    --if api.mainWindow then
+    --  api.mainWindow:draw(pass)
+    --end
     return false
 end
 
@@ -127,59 +155,62 @@ function lovr.recenter()
     end
 end
 
-if launch.mode == "desktop" then
-    function lovr.mousemoved(x, y, dx, dy)
-        backend.mousemoved(x, y, dx, dy)
-        interactionsUpdater.mouse.moved = {x=x, y=y}
-    end
+function lovr.mousemoved(x, y, dx, dy)
+    backend.mousemoved(x, y, dx, dy)
+    interactions.pointer.moved = {x=x, y=y}
+end
 
-    function lovr.mousepressed(x, y, button)
-        backend.mousepressed(x, y, button)
-        interactionsUpdater.mouse.pressed = {x=x, y=y, button=button}
-    end
+function lovr.mousepressed(x, y, button)
+    backend.mousepressed(x, y, button)
+    interactions.pointer.pressed = {x=x, y=y, button=button}
+end
 
-    function lovr.mousereleased(x, y, button)
-        backend.mousereleased(x, y, button)
-        interactionsUpdater.mouse.released = {x=x, y=y, button=button}
-        print("mouserelease")
-    end
+function lovr.mousereleased(x, y, button)
+    backend.mousereleased(x, y, button)
+    interactions.pointer.released = {x=x, y=y, button=button}
+end
 
-    function lovr.wheelmoved(x, y)
-        backend.wheelmoved(x, y)
-        interactionsUpdater.mouse.wheel = {x=x, y=y}
-    end
+function lovr.wheelmoved(x, y)
+    backend.wheelmoved(x, y)
+    interactions.pointer.wheel = {x=x, y=y}
+    print_r(interactions.pointer.wheel)
+end
 
-    function lovr.keypressed(key, scancode, isRepeat)
-        backend.keypressed(key, scancode, isRepeat)
-        interactionsUpdater.key.pressed = {key=key,scancode=scancode,isRepeat=isRepeat}
-    end
+function lovr.keypressed(key, scancode, isRepeat)
+    backend.keypressed(key, scancode, isRepeat)
+    interactions.key.pressed = {key=key,scancode=scancode,isRepeat=isRepeat}
+end
 
-    function lovr.keyreleased(key, scancode)
-        backend.keyreleased(key, scancode)
-        interactionsUpdater.key.released = {key=key,scancode=scancode}
-    end
+function lovr.keyreleased(key, scancode)
+    backend.keyreleased(key, scancode)
+    interactions.key.released = {key=key,scancode=scancode}
+end
 
-    function lovr.textinput(text)
-        backend.textinput(text)
-        interactionsUpdater.input = text
-    end
+function lovr.textinput(text)
+    backend.textinput(text)
+    interactions.input = text
 end
 
 function initInteractions(ecs)
 
   ecs.worldPhysics = lovr.physics.newWorld(0, 0, 0)
-  interactionsUpdater = ecs.processingSystem()
-  interactionsUpdater.updatethread = true 
-  interactionsUpdater.filter = function(obj) return true end -- always run 
+  interactions = ecs.processingSystem()
+  interactions.updatethread = true 
+  interactions.filter = function(obj) return true end -- always run 
   -- collider vars
-  interactionsUpdater.mouse = { released = false, pressed = false, moved = false, wheel = false}
-  interactionsUpdater.key = { released = false, pressed = false }
-  interactionsUpdater.input = ""
-  interactionsUpdater.hitpoint = lovr.math.newVec3()
-  interactionsUpdater.selectedBox = nil
-  interactionsUpdater.clear = function(o) foreach( o, function(k,v) o[k] = false end ) end
+  interactions.pointer = { released = false, pressed = false, moved = false, hover = false, wheel = false}
+  interactions.key   = { released = false, pressed = false }
+  interactions.input = ""
+  interactions.hitpoint = vector()
+  interactions.selectedBox = nil
+  interactions.clearTable  = function(o) foreach( o, function(k,v) o[k] = false end ) end
+  interactions.clear       = function()
+    interactions.clearTable( interactions.pointer )
+    interactions.clearTable( interactions.key   )
+    interactions.input = false               
+  end
 
-  function interactionsUpdater:process(obj, dt)
+  function interactions:process(obj, dt)
     ecs.worldPhysics:update(dt)
 
     local castsrc = 'hand/left/point'
@@ -189,30 +220,43 @@ function initInteractions(ecs)
 
     local direction  = quat(lovr.headset.getOrientation(castsrc)):direction()
     if direction ~= nil then 
-      local dx, dy, dz = direction:mul(50):unpack()
+      local dx, dy, dz = vector( direction * 50 ):unpack()
       local collider, shape, x, y, z = ecs.worldPhysics:raycast(ox, oy, oz, ox + dx, oy + dy, oz + dz)
 
       if collider then
+        interactions.pointer.hover = true
+        local node = collider:getUserData()
+        interactions.selectedBox = collider
+        interactions.hitpoint.x = x 
+        interactions.hitpoint.y = y 
+        interactions.hitpoint.z = z 
+
         for i, hand in ipairs(lovr.headset.getHands()) do
           if lovr.headset.isDown(hand, 'trigger') then
-            print("buttondown")
+            interactions.pointer.pressed = true
           end
-          if lovr.headset.wasReleased(hand, 'trigger') or interactionsUpdater['mouse']['released'] then
-            print("cast: mousedown!")
-            local node = collider:getUserData()
-            interactionsUpdater.selectedBox = collider
-            interactionsUpdater.hitpoint:set(x, y, z)
-            if node.onclick ~= nil then node.onclick(node,collider) end
+          if lovr.headset.wasReleased(hand, 'trigger') then
+            interactions.pointer.released = true
           end
         end
+        if interactions.pointer.released and node.onclick ~= nil then 
+          node.onclick(node,collider)
+        end
       end
     end
-    -- reset stuff
-    interactionsUpdater.clear( interactionsUpdater.mouse )
-    interactionsUpdater.clear( interactionsUpdater.key )
-    interactionsUpdater.input = false
+    -- backup & reset stuff
+    interactions.event = { 
+      input    = util.clone(interactions.input),
+      pointer  = util.clone(interactions.pointer),
+      key      = util.clone(interactions.key),
+      hitpoint = { x = interactions.hitpoint.x, y = interactions.hitpoint.y, z = interactions.z },
+      --head     = { x = ox, y = oy, z = oz, direction = direction},
+      collider = collider
+    }
+    -- clear interactions
+    interactions.clear()
   end
-  ecs.addSystem( api.world, interactionsUpdater )
+  ecs.addSystem( api.world, interactions )
 end
 
 function initCleanups(ecs)
diff --git a/xurfer/util.lua b/xurfer/util.lua
index ae8724e..c3ec80c 100644
--- a/xurfer/util.lua
+++ b/xurfer/util.lua
@@ -15,10 +15,26 @@ util.loaddir = function( path, api, target)
     if api.filesystem.isFile(ext) then
       print("[i] loading '" .. v .. "'")
       target[ v ] = api.filesystem.load( ext )(api)
+      if target[ v ].index == nil then target[v].index = api.ext.max / 2 end
     end
   end)
 end
 
+util.clone = function(orig)
+  local orig_type = type(orig)
+  local copy
+  if orig_type == 'table' then
+      copy = {}
+      for orig_key, orig_value in next, orig, nil do
+          copy[util.clone(orig_key)] = util.clone(orig_value)
+      end
+      setmetatable(copy, util.clone(getmetatable(orig)))
+  else -- number, string, boolean, etc
+      copy = orig
+  end
+  return copy
+end
+
 util.cmdExist = function(cmd)
   if api.runtime.os == 'unixy' then cmd = cmd .. " 1>/dev/null 2>/dev/null" end
   local stdout, retstr, retcode = os.execute(cmd)
@@ -27,7 +43,7 @@ end
 
 util.exec = function(obj, fn,a,b,c,d,e,f)
     foreach( obj,
-      when('enabled',true, util.call(fn,a,b,c,d,e,f) )
+      when('enabled', true, util.call(fn,a,b,c,d,e,f) )
     )
 end
 
@@ -198,9 +214,9 @@ end
 -- LUA SYNTAX SUGAR (from here on )
 -- 
 
-function foreach(table, f)
-  if table ~= nil then 
-    for k, v in pairs(table) do f(k, v) end 
+function foreach(t, f, sort)
+  if t ~= nil then 
+    for k, v in pairs(t) do f(k, v) end 
   end
 end