Blocksum is an addictive and unique puzzle game. The game is about to add numbers or blocks to each other. If you want to destroy these blocks you have to make some more numbers to each other. Example is: if u wants to destroy the block with number 6 you have to get 6 blocks next to each other, but to demolish the chain of blocks with the number 8 you require the 8 similar chains associated to each other. For the people who like tetris or similar game, this game is excellent for them. The controls of this game are arrows for movement, Z for adding numbers and X to add extra line or to increase speed.