I have highscores working perfectly, but one problem, it only updates when the app is reloaded, and if installed on device I must kill the process and reopen app, otherwise, even though the highscore is saved, it doesn’t display it.
Download the a.zip (project files) You’ll see that the left number is highscore, but only updates upon relaunch/corona restart.
PLLLLLEEEASE HELP 
–Hide the status bar
display.setStatusBar(display.HiddenStatusBar)
–Saving/Loading Stuff
local ego = require “ego”
local saveFile = ego.saveFile
local loadFile = ego.loadFile
–Create the background and make it blue
local bg = display.newRect( 0, 0, 320, 480 )
bg:setFillColor( 150, 180, 200 )
–Start the score at 0
local score = 0
–Create score text and make it dark gray
local scoreText = display.newText(score, 200, 20, native.systemFont, 24)
scoreText:setTextColor( 80, 80, 80 )
–Function to add to score and update scoreText
local function addToScore()
score = score + 1
scoreText.text = score
end
bg:addEventListener(“tap”, addToScore)
–Load highscore value from file. (It will initally be a string.)
highscore = loadFile (“highscore.txt”)
–If the file is empty (this means it is the first time you’ve run the app) save it as 0
local function checkForFile ()
if highscore == “empty” then
highscore = 0
saveFile(“highscore.txt”, highscore)
end
end
checkForFile()
–Print the current highscore
local hs = display.newText(highscore, 100, 20, native.systemFont, 24)
hs:setTextColor( 80, 80, 80 )
–When the app is quit (or simulator refreshed) save the new highscore
–(If score > highscore the data will not be changed)
local function onSystemEvent ()
if score > tonumber(highscore) then --We use tonumber as highscore is a string when loaded
saveFile(“highscore.txt”, score)
end
end
Runtime:addEventListener( “system”, onSystemEvent )