mesmerizing! Sure, it's that old space invaders everybody knows, moving left, right, one button to shoot...only beefed-up to such an excessive level it becomes a whole different experience with psychedelic (and fantastic though simplistic) visual, hypnotic techno BGM, interactive sound FX and actually a subtle gameplay including multiple weapons, varied waves of enemies and branching levels. The vibration cartridge compatibility is a nice and well executed touch but since the vibrations follow the beat of the soundtrack, it can get annoying. Put the GBA port to a better use and plug the paddle controller in instead. The Taito controller accessory adds up significantly to the experience with faster and more accurate motion: the paddle controller is THE way to play this game which fits the DS perfectly.