Click the big purple button right as the game starts. This will synchronize the timer. Ignore the green flag. - A descending ding pattern indicates diamonds spawning. (high to low pitch) - An ascending ding pattern indicates emeralds spawning. (low to high pitch) - Click the button in the bottom right to toggle sound. - The number above each gem indicates how long until an item drop
Thanks so much to all the great people who helped me collect the data needed for this. You guys rock.