sprite isnt moving after i imp0lemented a staart screen

  camera = object
    x = 0
    y = 0
  end
end
updateCamera = function()
  camera.x=spritex
  camera.y=spritey
end
init = function()
  screen.setFont("FixedBold")
  start = 1
  initCamera()
bigg = 70
spritex = 0
spritey = 0
slimespeed = 3
camera.x = 0
camera.y = 0
frontbackleftright = "front"
end
update = function()
  if start == 1 then
    if mouse.pressed != 0 then
      start = 0
    end
if start == 0 then
  if keyboard.LEFT or gamepad.LEFT then
    spritex = spritex - slimespeed
    frontbackleftright = "left"
  end
  if keyboard.RIGHT or gamepad.RIGHT then
    spritex = spritex + slimespeed
    frontbackleftright = "right"
  end
  if keyboard.UP or gamepad.UP then
    spritey = spritey + slimespeed
    frontbackleftright = "back"
  end
  if keyboard.DOWN or gamepad.DOWN then
    spritey = spritey - slimespeed
    frontbackleftright = "front"
  end
end
end
updateCamera()
end
draw = function()
  if start == 1 then
    screen.clear()
    screen.drawMap("pakts", 0, 0, screen.width, screen.height)
    screen.drawTextOutline("Press Click to Start",0,0,10, "black")
    screen.drawText("Press Click to Start", 0, 0, 10, "#486a47")
    else
      if start == 0 then
        screen.clear()
        screen.drawMap("map2", -camera.x, -camera.y, 1500, 1000)
        screen.drawMap("objects", -camera.x, -camera.y, 1500, 1000)
        screen.drawSprite(frontbackleftright, spritex-camera.x, spritey-camera.y, bigg, bigg)
      end
  end
end