DSiWare Bookworm is limited to classic mode and keeps track of the top three scores. The Bookworm DS game has two more game modes, fast-paced Action and wireless Multiplayer. The game also adds an 18 room library, 20 unlockable books, and the all-new Lex-Ray that keeps track of your progress and all your stats.
Here is an IGN review of the game:
Note: If you're left-handed, there is no left-hand mode like Brain Age, you're stuck playing this game right-handed.