It's a race against time in this color matching game. The blocks keep coming and it's your job to keep an eye out for massive combinations. As you clear blocks, they will be pulled closer together to give you the opportunity to find more combinations. There are specials that will blow up multiple blocks, whole rows or columns, and even specials to slow the time down, but they are limited so don't go over-zealous too early or you will find yourself stuck. The best advice is to not slow down - once you slow down, the blocks will pile up before you realize it.