An interactive word search puzzle presents a 15x15 grid of letters containing fifteen themed words, including "SUMMER," "RAIN," and "HAPPY." Players select letters by clicking and dragging across horizontal, vertical, or diagonal paths to highlight and match words from the list. The code uses vanilla JavaScript DOM manipulation and event listeners (`mousedown`, `mouseenter`, `mouseup`) for selection logic, while CSS Grid defines the board layout. Successfully found words become highlighted pink in the grid and are struck through in the word list, with a "New Game" button regenerating the puzzle.