This is a very very early demo for Tempest. While an
actual prototype for this version has not yet been found (if it
was ever burned onto EPROMs), it was featured in the Atari
In-House Promo 2nd Quarter 1983 video which was made to show other
Atari employees what everyone was working out at the time.
This demo appears to only consist of a few of the level designs
zooming inward to the front of the screen. Given the early
date of this video it's not surprising that Tempest is in such an
early state.