Did you know that you can download handheld games now? That's amazingly convenient! The only inconvenient part of it is finding the right games to buy -- and that's where we come in, with our Portabliss column. In each installment, we'll tell you about a downloadable game on the iPhone, iPad, Android device, DSi, 3DS, PSP, etc. Today: Groove Coaster! Groove Coaster takes the flashy style of Space Invaders Infinity Gene, a game that turned music into shmup stages, and applies it to a straight-up rhythm game that takes no time to learn and, perhaps, too long to bring myself to stop playing. It's really fun! And, before I go any further, it's temporarily 99 cents, so go buy it.

OK, now back to the game. Groove Coaster takes its name from roller coaster-like lines, dotted with, well, dots that indicate when to tap the screen. When your avatar crosses one of these dots, you tap anywhere, or occasionally swipe to the side, hold, or "scratch," corresponding to the beat. It's pretty easy to understand! And, at first, it's pretty easy to play.