We play mission mode ... for five levels. The rest will cost extra.
We play puzzle mode ... for five levels. The rest will cost extra.
We play VS CPU ... for ten levels. The rest will cost extra.
According to the obnoxious messages, XBLM will soon be home to a Mission/Puzzle pack and a VS CPU pack. Assuming those cost about as much as the Advanced Pack (600 MS points apiece), we're looking at a total package of 3,000 MS points ($37.50). For reference, the Lumines II for PSP and Lumines Plus for PS2 are only $29.99 each. The Xbox Live version, then, is only worth it if you have no interest whatsoever in two of the extra packs.
Microtransactions and a la carte gaming are the new business models (one that EA has embraced with open wallets), but we don't always have to like it. Make up your own mind if $7.50 more is worth the Xbox Live experience.