LUA - Unable to make the game restart after the timer finishes - lua

Question

I have to make a small game for my college work and at the end of the game I would like it so if you click the game over button it restarts it, however every time I have tried to do this it hasn't worked with either errors or just the game restarting and the game over image not being removed.
I know that the current code exits the app when the gameover sign is clicked due to the closeDownApp function (this is the code from before I tried to add the ability to restart)
Any help on how to do it will be greatly appreciated
--Define the variables
rotateAmt = 5
rotateMin = -90
rotateMax = 90
cannonRotation = 0
cannonForce = 1200
playerPoints = 0
targetHit = false
timeLeft = 600
--Define the functions
function closeDownApp(event)
os.exit ( )
end
function update( )
--decrease the time counter
timeLeft = timeLeft - 1
scoreDisplay.text = 'Kills: ' .. playerPoints .. ' Time: ' .. timeLeft
--check if the time has run out
if (timeLeft <= 0) then
--display the final score
scoreDisplay.text = 'Your score was ' .. playerPoints
--remove all of the screen objects
display.remove(cannonBarrel)
display.remove(target)
display.remove(upButton)
display.remove(downButton)
display.remove(fireButton)
--display the 'game over' sign
gameOver = display.newImage('gameover.png', 150, 75)
gameOver:addEventListener('tap', closeDownApp)
-- make a group
end
--check if the target has been hit
if (targetHit == true) then
targetHit = false
playerPoints = playerPoints + 1
Hit = display.newImage('Hit.png', target.x, target.y)
--replace the target with the hit picture
transition.dissolve(Hit, target, 1000, 0)
display.remove(bullet)
--put the target back to a random position
target.x = math.random(280, 500 )
target.y = math.random(100, 290 )
end
end
function onCollide(event)
targetHit=true
end
function fire(event)
--only fire at the beginning of a touch event
if (event.phase == 'began') then
media.playSound('bang.wav')
bullet = display.newImage('bullet.png')
--move the image
bullet.x, bullet.y = cannonBarrel:localToContent(70, 0)
bullet.rotation = cannonRotation
--apply physics to the cannonball
physics.addBody( bullet, { density=2.0, friction=0.2, radius=15 } )
--determine the appropriate ratio of horizontal to vertical force
force_x = math.cos(math.rad(cannonRotation)) * cannonForce
force_y = math.sin(math.rad(cannonRotation)) * cannonForce
--fire the cannonball
bullet:applyForce( force_x, force_y, bullet.x, bullet.y )
end
end
function moveDown(event)
--only move the barrel if the touch event started
if (event.phase == 'began') then
cannonRotation = cannonRotation + rotateAmt
if (cannonRotation >= rotateMax) then
cannonRotation = rotateMax
end
cannonBarrel.rotation = cannonRotation
fireButton.rotation = cannonRotation
end
end
function moveUp(event)
--only move the barrel if the touch event started
if (event.phase == 'began') then
cannonRotation = cannonRotation - rotateAmt
if (cannonRotation <= rotateMin) then
cannonRotation = rotateMin
end
cannonBarrel.rotation = cannonRotation
fireButton.rotation = cannonRotation
end
end
function makeTarget( )
target = display.newImage('target.png')
target.x = math.random(280, 450)
target.y = math.random(100, 290)
physics.addBody(target,{density=1.0, friction=0.5, bounce=0.05, radius=15})
target.bodyType = 'static'
target:addEventListener('collision', onCollide)
end
function makeInterface( )
--up button
upButton = display.newImage('up_button.png')
upButton:translate(3, 37)
upButton:addEventListener('touch', moveUp)
--down button
downButton = display.newImage('down_button.png')
downButton:translate(3, 176)
downButton:addEventListener('touch', moveDown)
--fire button
fireButton = display.newImage('fire_button.png')
fireButton:translate(19, 124)
fireButton:addEventListener('touch', fire)
--display cannon parts
cannonBarrel = display.newImage('cannon_barrel.png')
cannonBarrel:translate(73, 109)
--display score
scoreDisplay = display.newText( ('Points: ' .. playerPoints), 70, -18, native.systemFont, 20 )
scoreDisplay:setTextColor( 255,255,255 )
scoreDisplay:translate(display.contentHeight /2, 30)
end
--Define control structure
function init( )
audio.stop (1)
display.setStatusBar(display.HiddenStatusBar)
background = display.newImage('bg.jpg')
physics = require('physics')
physics.setDrawMode('normal')
physics.start( )
makeInterface( )
makeTarget( )
Runtime:addEventListener('enterFrame', update)
local backgroundMusic = audio.loadStream("theme.mp3")
local backgroundMusicChannel = audio.play( backgroundMusic,{channel=2, loops=-1, fadein=10 })
audio.setVolume( 0.5, { channel=backgroundMusicChannel } )
end
function introScreen( )
local backgroundMusic1 = audio.loadStream("intro.mp3")
local backgroundMusicChannel1 = audio.play( backgroundMusic1,{channel=1, loops=1, fadein=10 })
-- Display the background
background = display.newImage ("IntroScreen.png")
-- Display the play button at the top right
playBtn = display.newImage ("playBtn.png", 350, 10)
playBtn:addEventListener('tap', init)
end
--Call the code
introScreen( )

Answer 1

This seems like it was written for Corona SDK. Their forums (https://forums.coronalabs.com/) seem very active.
I'm sure that you'd be able to solve this issue a lot faster by asking for help there.