Scramble is not Lumines Live. Now that we've accepted that, let's consider the once delayed 1981 shooter and why you might be inclined to spend 400 MS points ($5) on it. Clearly, its educational value with regards to the many dangers of spaceship travel (observation: everything is out to kill you) is unsurpassed, but the core gameplay is quite easily sussed out. Scramble is a very basic and very traditional shooter -- more than enough description for shooter fans to show interest and everyone else to write it off as old hat. As with Konami's other Xbox Live Arcade releases (like the excellent Time Pilot from two weeks ago), the download includes updated graphics and sound, online matches, achievements and scoreboards.
Microsoft should be announcing the next round of Xbox Live Arcade Wednesdays within the next week. Hold on to your plummeting, musically inclined blocks until then.