Stop It comprises 8 * 8 grid with lower left corner (yellow box) as starting point and top right corner (grey box) as the stopping point. Initially, it shows a trace of path traverses by the yellow box in current level. Once the START button is clicked, player needs to carefully monitor to match the yellow box with grey box position during its traversal, and hit STOP button when the match happens. It is bounded by countdown timer and maximum of 3 chances for each level. This has 25 different levels which comprise different trajectories in each level, and by clearing current eligible level, next level gets unlocked.
Remember to have acute observation on trajectory hint, be patient to monitor yellow box traversal, and be agile enough to respond in timely manner, utilizing the countdown timer and chances in optimal manner. Have loads of fun with different levels.