code love2d

enemy = {}
enemies_controller = {}
enemies_controller.enemies = {}

function love.load()
    player = {}
    player.x = 0
    player.y = 450
    player.bullets = {}
    player.cooldown = 20
    player.speed = 1
    player.fire = function()
      if player.cooldown <= 0 then
        player.cooldown = 20
        bullet = {}
        bullet.x = player.x + 5
        bullet.y = player.y
        table.insert(player.bullets, bullet)
      end
    end
    enemies_controller:spawnEnemy(0,0)
    enemies_controller:spawnEnemy(100, 0)
end

function enemies_controller:spawnEnemy(x, y)
    enemies = {}
    enemy = {}
    enemy.x = x
    enemy.y = y
    enemy.bullets = {}
    enemy.cooldown = 20
    enemy.speed = 1
    table.insert(self.enemies, enemy)
end

function enemy:fire()
  if self.cooldown <= 0 then
    self.cooldown = 20
    bullet = {}
    bullet.x = self.x + 5
    bullet.y = self.y
    table.insert(self.bullets, bullet)
  end
end

function love.update(dt)
    player.cooldown = player.cooldown - 0.1

    if love.keyboard.isDown('a') then
      player.x = player.x - player.speed
    end
    if love.keyboard.isDown('d') then
      player.x = player.x + player.speed
    end

    if love.keyboard.isDown("space") then
      player.fire()
    end

    for _,e in pairs(enemies_controller.enemies) do
      e.y = e.y + 0.2
    end

    for i,b in ipairs(player.bullets) do
      if b.y < -10 then
        table.remove(player.bullets, i)
      end
      b.y = b.y - 0.7
    end
end

function love.draw()
    ---Draw the Player, kthxbye
    love.graphics.setColor(0, 0, 255)
    love.graphics.rectangle("fill", player.x, player.y, 20, 20)

    ---Draw the Enemy, kthxbye
    love.graphics.setColor(255,0,0)
    for _,e in pairs(enemies_controller.enemies) do
      love.graphics.rectangle("fill", e.x, e.y, 20, 20)
    end

    ---Draw bullets, kthxbye
    love.graphics.setColor(255,255,255)
    for _,b in pairs(player.bullets) do
      love.graphics.rectangle("fill", b.x, b.y, 10, 10)
    end
end