The problem is with either the hardware you’re using, or your animation.
That’s two people who’ve tried your animation on a Player and it’s working OK. As I’ve explained already all we do is open the URL you give us in Internet Explorer. We have no further control to optimise it I’m afraid. It is what it is.
If your system lags, then the only route to improvement is to optimise further your animations, or the hardware you’re running on.