Zombies are hidden in a board. Find them all to finish a level. Each is hidden with only the numbers on the sides giving clue to where they are. If one of the rows has a number one written on it, then there must be one zombie hidden amongst the blocks. You must next look at the column to pinpoint the exact location of the zombie. Ghost and vampires are also seen in the game. Although it may be only possible to play later levels with the full version. The interesting part of the game is the addition of mirrors on the board. This bounces the value written to the sides to the ones perpendicular to it. So a value written on a row can be bounced on a column. This really mixes things up and may confuse you where the real zombie is hiding. Clicking on too many blocks will not finish the level. You must find the exact number of zombies indicated at the top right corner of the gaming screen. You will see a small animation of a zombie rising from the ground when you click on a block. You can also see it below the block giving you hints on how to play the game.