diff --git a/sys/apis/sound.lua b/sys/apis/sound.lua
index b4dab46..18dad1c 100644
--- a/sys/apis/sound.lua
+++ b/sys/apis/sound.lua
@@ -5,10 +5,9 @@ local Sound = {
 }
 
 function Sound.play(sound, vol)
-	local speaker = peripheral.find('speaker')
-	if speaker then
-		speaker.playSound('minecraft:' .. sound, vol or Sound._volume)
-	end
+	peripheral.find('speaker', function(_, s)
+		s.playSound('minecraft:' .. sound, vol or Sound._volume)
+	end)
 end
 
 function Sound.setVolume(volume)
diff --git a/sys/apis/ui.lua b/sys/apis/ui.lua
index 068b7d9..dcc0ae8 100644
--- a/sys/apis/ui.lua
+++ b/sys/apis/ui.lua
@@ -46,7 +46,7 @@ end
 local Manager = class()
 function Manager:init()
 	self.devices = { }
-_G._pp = self
+
 	local function keyFunction(event, code, held)
 		local ie = Input:translate(event, code, held)