Fireworks are fun!
The graphics are extremely beautiful, bright, and colorful. Each world has it's own flair, from Hong Kong (where you begin) through the Arctic and all the way into the Ocean. The controls are easy to manipulate, but the game is difficult to challenge even seasoned gamers.
The music is good too, although it can get repetitive as you must play a level over and over to win. After you win, there's a special challenge mode that is even more difficult than the original. Once you beat that, you get some kind of alarm clock prize. I am only a few levels away from winning it.
If you are in a relaxing sort of mood, you can also set off fireworks just for fun.
I would highly recommend this game to everyone who owns a DS. It's smart, fun, and fast-paced - everything a proper video game should be.