I have played it. It's pretty bad. If you're a diehard Bubble Bobble-maniac the game may be worth getting for the faithful port of the original (which only uses the bottom screen), but even that is compromised by the inability to gameshare for multiplayer (especially inexcusable after Mario Kart's 8-player single card option). Still, I prefer it slightly to Bubble Bobble Old & New (GBA), because there's very little scrolling and a clearer picture.
The remixed version is pretty much worthless. Main problem is that ol' scrolling thing again: the levels are too big, so you can't take in all the action at once, which is one of the original's strengths. Why they didn't just double the playing field vertically (which they also do, but they arguably screw up the jumping by not compensating for the room between the two screens) is beyond me. Graphics are drab and far less charming than those of the original, although the character design isn't nearly as bad as the cover artwork. Bonus points for some nifty if limited use of the microphone in some of the levels (blow to make a fan work), fun boss battles and a four player mode (good luck finding three other people who own this game, though), but they don't quite make up for the flaws.
All that said, I'm actually still somewhat interested in the developer's Rainbow Islands update, since that game's vertical gameplay could benefit more from the doubled height, and they seem to have implemented some interesting usage of the Touch Screen (draw your own rainbows, Kirby-style). But after this and Space Invaders Revolution (which I played at E3 and thought pretty bland), I'm not holding my breath...
