sound and other misc fixes

room.lua

@@ -140,6 +140,9 @@ function Room:getRenderChannels()
 	for _, color in ipairs({"red", "green", "blue"}) do
 		if self.player[color] then table.insert(channels, color) end
 	end
+	-- No player copy lives here, so the view would be black. In debug/dev mode
+	-- render every channel instead, letting whole (player-less) levels be seen.
+	if #channels == 0 and DEBUG then return {"red", "green", "blue"} end
 	return channels
 end
 
@@ -456,6 +459,7 @@ function Room:movePlayerLocal(key)
 	end
 
 	if moved then
+		if Sound then Sound.play("playerMove") end
 		if useWorld then gameWorld:playerJoinCheck(self, previousPositions, newPositions)
 		else self:playerJoinCheck(previousPositions, newPositions) end
 		self:tick()
@@ -1119,6 +1123,7 @@ function nextRoom(pos)
 
 	local currentName = currentRoom.name
 	local nextName = gameWorld and currentName and gameWorld:getNeighbor(currentName, exit)
+	if Sound and nextName and nextName ~= currentName then Sound.play("levelChange") end
 	currentRoom:save()
 
 	-- Missing map neighbours intentionally wrap back into the room just exited.