I've been playing it for the last two days and I'm loving it.

The game is now a fusion of Galaga and Classic Space Invaders, everything moves at a faster pace, which makes the game much better than the original. The color scheme is bright and vibrant, plus the backgrounds remind me of DDR, they're full of flashing lights and colors. It gets you in a trance state of mind without being distracting. There's some cool powerups to your weapons as well, including a Laser, Bombs, Multi Shot, a Shield and more. Plus the music is awesome, it starts out slow, but for every enemy you hit it makes a new noise to the soundtrack, so you create your own music while you play. It's a very cool and subtle feature.

The main game mode is Arcade Mode, which takes you through 5 increasingly difficult areas, full of different types of enemy formations, bonus levels, and finally really cool boss battles at the end of each area. You can even save between areas and retry if you lose all your lives.

You can also play Ranking Mode, which is the same as Arcade Mode but without the save option but you can upload your high scores to a Global Leaderboard through Nintendo Wi-Fi Connection.

There's also two player multiplayer for Single Cart, Dual Cart, and Nintendo Wi-fi. In multiplayer both players play the levels but every enemy that you kill is sent to your opponents screen, think Tetris Multiplayer.

The features may seem on the light side, but when you factor in the game's low $20 Price and awesome gameplay and music, this is a game no DS owner should miss.