the author of this app says:
Bookworm is a popular word game based on the online and PC classic from PopCap. Feed Lex the Worm's endless appetite by joining letters on the library wall! Use up burning letters before they reach the bottom and set the library on fire! Special bonus tiles boost your score if used to make a word.
Bookworm is a superb word game for beginners and experts alike and allows you to test or increase your word power in a fun and enjoyable way!
Windows Mobile 2003/SE, 5, or 6.