Merge Defense: Pixel Blocks

Merge Defense: Pixel Blocks is a fun puzzle game created for free for boys. You can play it online. In this game you can merge two blocks with the same number to turn them into a block with a larger number. Move the blocks to the fortress grid and you can attack the invaders with blocks. The larger the number on the block, the more damage that block can do. So go ahead and merge! Good luck!