Player.ChildAdded script, to add stats not working

[technoguyx]

I'm trying to add two IntegerValues to the (only - SP game) player's Stats object, but it doesn't seem to work unless I run the script manually with the right-click menu. I've Enabled it, and tried it under World and Players, yet nothing happens. It yields no errors.

I'd appreciate it if someone could check this and tell me if anything's wrong.

Code:

link(game.Players.ChildAdded, function(p)

if p.Type == "Player" then
   local score = create("IntegerValue")
   score.Name = "Score"

   local hiscore = create("IntegerValue")
   hiscore.Name = "Hi-Score"

   score.Parent = p.Stats
   hiscore.Parent = p.Stats --*nothing* happens after all this. Can't even see values in leaderboard.
end
    
_G.score = function(a) --attempting to use these globals tells me the script tried to reference nil, presumably due to player not being defined.
   if p.Stats.Score then
      local lescore = p.Stats.Score.Value
      local lehiscore = p.Stats["Hi-Score"].Value
      
      lescore = lescore + a
      
      if lescore > lehiscore then
         lehiscore = lescore
      end
   end
end

_G.reset = function()
   if p.Stats.Score then
      p.Stats.Score.Value = 0
   end
end
  
end)