function love.update(dt)
        world:update(dt) --this puts the world into motion
        if love.keyboard.isDown("right") then
                objeto.bola.body:applyForce(400, 0)
        elseif love.keyboard.isDown("left") then
                objeto.bola.body:applyForce(-400, 0)
        elseif love.keyboard.isDown("r") then
                objeto.bola.body:setPosition(screen.wc, screen.hc)
                objeto.bola.body:setLinearVelocity(0, 0)
                puntuacion = 0
                puntuacion_max = puntuacion
        elseif
                love.keyboard.isDown("down") then
                objeto.bola.body:applyForce(0,400)
        elseif
                love.keyboard.isDown("up") then
                objeto.bola.body:applyForce(0,-400)
        end
end