Damn good game!! I've never played Lumines, so I'm still figuring things out, but I'm having a blast regardless. I really appreciate how slow the blocks fall at first - gives me plenty of time to think things over without getting overwhelmed.
The aesthetics are amazing, too. The soundtrack slaps, the visuals are stylish, and all the clicky SFX make my brain happy.
It kinda reminds me of the small DSi-ware puzzle games I played as a kid (and then I found the LCD filter and the vibe was complete). It's perfect to play in bite-sized chunks, but it's got an atmosphere so thick you could play it for hours.