Base lua game dev

love = require 'love'

function love.load()
    anim8 = require 'libraries/anim8'
    love.graphics.setDefaultFilter('nearest', 'nearest')

    player = {}
    player.x = love.graphics.getWidth()/2 - 80/2
    player.y = love.graphics.getHeight()/2 - 80/2
    player.speed = 5

    player.spriteSheet = love.graphics.newImage("sprites/player-sheet.png")
    player.grid = anim8.newGrid(12, 18, player.spriteSheet:getWidth(), player.spriteSheet:getHeight())

    player.animations = {}
    player.animations.down = anim8.newAnimation(player.grid('1-4', 1), 0.2)
    player.animations.left = anim8.newAnimation(player.grid('1-4', 2), 0.2)
    player.animations.right = anim8.newAnimation(player.grid('1-4', 3), 0.2)
    player.animations.up = anim8.newAnimation(player.grid('1-4', 4), 0.2)

    player.anim = player.animations.left
end

function love.update(dt)
    local isMoving = false

    if love.keyboard.isDown("a", "left") then
        player.x = player.x - player.speed
        player.anim = player.animations.left
        isMoving = true
    end

    if love.keyboard.isDown("d", "right") then
        player.x = player.x + player.speed
        player.anim = player.animations.right
        isMoving = true
    end

    if love.keyboard.isDown("s", "down") then
        player.y = player.y + player.speed
        player.anim = player.animations.down
        isMoving = true
    end

    if love.keyboard.isDown("w", "up") then
        player.y = player.y - player.speed
        player.anim = player.animations.up
        isMoving = true
    end

    if isMoving == false then
        player.anim:gotoFrame(2)
    end

    player.anim:update(dt)
end

function love.draw()
    player.anim:draw(player.spriteSheet, player.x, player.y, nil, 6, nil, 6, 9)
end