function GameStep()
  SetCollisionFlags()
  if menu_type == "no" then
    for _, particle in pairs(LoadedParticles) do
      particle:Smart()
    end
    for _, enty in pairs(LoadedObjects.Entities) do
      enty:Smart()
    end
  end

  for _, particle in pairs(LoadedObjects.Particles) do
    particle:DoPhysics()
  end
  for _, enty in pairs(LoadedObjects.Entities) do
    enty:DoPhysics()
  end

  AnimateTiles()
  Camera:positionCenterAt(main_Player.pos.x, main_Player.pos.y)
  --camera:positionAt(main_Player.pos.x, main_Player.pos.y,game.width,game.height)

	if Keybind:CheckPressed(Keybind.debug.debug) then
		if debug then
			debug = false
			debug_collision = true
		elseif debug_collision then
		 debug_collision = false
		else
		 debug = true
		end
	end

	if Keybind:CheckPressed(Keybind.debug.reposition) then
		if not editor_mode then
			main_Player.pos.x, main_Player.pos.y = 16,-10
		end
	end

	if Keybind:CheckPressed(Keybind.debug.reload) then
		  MenuClear()
      menu_type = "dialog"
			MenuInit("dialog",DialogSequence.Example)
	end

	if Keybind:CheckPressed(Keybind.debug.editor) then
		editor_mode = true
	end

	if Keybind:CheckPressed(Keybind.debug.recording) then
		if DemoRecording then
      Demo:RecordEnd()
    else
      Demo:RecordStart()
    end
	end

  if Keybind:CheckPressed(Keybind.debug.playback) then
  	if DemoPlayback then
      Demo:PlaybackEnd()
    else
      Demo:PlaybackStart()
    end
  end
end

function GameDraw()

  -- prepare
  GameworldDrawPrepare()
  GameWorldUpdateLights()

  -- background
  GameworldDrawBackground()
  GameworldDrawLights()
  GameworldDrawEntitiesBackground()

  -- foreground
  GameworldDrawForeground()
  GameworldDrawParticles()
  GameworldDrawEntities()

  if LevelData.properties.darkness then
    GameworldDrawDarkness()
  end
  -- end
  GameworldDrawEnd()

	-- hud
	textScale = 1

  -- debug
  if debug then DebugUI() end
  if debug_collision then
  	DebugColisions()
  	DebugEntities()
  end
end