Bookworm Adventures follows the tale of a little green worm named Lex (of the original Bookworm game) throughout 3 themed books as he spells words to defeat evil monsters. The main game interface is a 4x4 grid of letters, and unlike in the original Bookworm game, the letters do not need to connect to form words. The game is turn-based, and after the user attacks their opponent, the opponent then takes its turn. Each book is divided into 10 chapters that culminate in a "boss battle" in which the player is rewarded with a treasure upon defeating the enemy. Treasures do many things, ranging from increasing damage for using certain letters, to stunning the enemy, and a whole lot more. A player can only choose 3 treasures to bring with them into a chapter (out of an eventual total of 31).