Keep down the blocks.. Try to beat the UltraBlock!

Click on a group with a minimum of 3 blocks to eliminate them. When you make a mistake, the block will become a skull. If you click the skull again, you will be penalized with 1 row of blocks. As the game progresses, the blocks will be climbing faster.

Try to click on power ups at the right time to help you finish the level. The lower the pile is, the better your chances. Be careful when clicking because the skulls are permanent until the end of a round.

Click on the group of blocks you want to eliminate

(Source: http://ultra-block.freeonlinegames.com/)