ZenCube Free

There's nothing complex about ZenCube, it's a game designed to keep you entertained and nothing else. There's no highscore, no time limit, there's nothing to rush you or force you to act before you're ready. Reach your zen state by challenging the left side of your brain while leaving your right open to consider whatever is on your mind.

It's excellent at improving your number recognition, the ability to immediately add two numbers together without thinking about it. But ultimately it's a fun little diversion when you have a couple of minutes to pass.

Instructions
Simply click two blocks that are no more than 3 cubes away from each other. If their numbers, when added together, are equal to or less than the number shown at the top of the screen the cubes will be removed. If they exceed that number a new row of cubes will fall down. In case you're stuck and cannot click two cubes, then simply click the geometric figure in the middle to force a row to drop down. That's it. You win when there's 1 or fewer cubes remaining.