player.lua

Player = {}

setmetatable(Player, {
    __call = function(self, keys, speed)
        local player = {
            score = 0,
            pos = 0,
            keys = keys,
            speed = speed or 5
        }
        return setmetatable(player, {__index = Player})
    end
})

function Player:updateScore()
    self.score = self.score + 1
end

function Player:updatePosition()
    local up, down = love.keyboard.isDown(self.keys[1].key), love.keyboard.isDown(self.keys[2].key)
    if up or down then
        newPos = up and (self.pos - self.speed) or (self.pos + self.speed)
        self.pos = (newPos >= height-64) and height-64 or (newPos <= 0) and 0 or newPos
    end
end