From Craig Hart:
With Word Game Pro for Android you make words from a pile of 7 random letters against the clock for high score. Many game play twists make this highly addictive and unique. Select letters from the Rack in the middle of the screen to form a word of 3 or more letters. Press the Submit word button when your word is complete. If the word matches one in the dictionary then a score is calculated by adding the values of the letters in the word. See later for other scoring rules. The letters used are removed from the rack and are replaced with the next ones from the Pile at the bottom of the screen.