A forgotten 2600 classic, gorgeous graphics but repititive gameplay meant it never achieved the success of "Moving Pixel" and "David Crane's Beeping Square".
I actually have this "game", but not on an X-Box. It's included as a bonus feature on the Activison Anthology compilation for GBA. Incidentally, titles like Robot Tank, River Raid, H.E.R.O. and such have held up remarkably well and it sees a ton of play on my DS.