Really good
This is perhaps the only Lumines-inspired flash game I've seen, and I'm happy with this mixup of it, the videos provides just as much difference to the skins as with the games, plus I loved the Doeo skin.
Although there is one thing I noticed, perhaps you could change the rate of falling for blocks based on each skin as with the actual games? It could provide more challenge to certain skins, adding to uniqueness. Other than that, great game.