PLEASE READ: Just click the balls and it will pop! To change the colors, use all the numbers. If you change the number and only press A, It will go back to the starter color. But for example, If you selected the number 8, you would have to press the 8th letter on the middle row on your keyboard to reset your Pop It. You will start on the 1st color. The number 0, does not do anything.
This took me a lot of trial and error. But after all of the mess ups, I finally completed this game. Make sure to have fun!