Today's Game of the Day is a delicate puzzle game. The concept sounds simple: as the floor shifts below your feet, pick up white balls while on white, and pick up black balls while on black. But as you'll quickly discover, it's not that easy.

Windows of Opportunity will test your ability to take opportunities as they arise. To be successful you'll need to combine strategic planning with flexibility and risk-taking. You only have a limited amount of steps, so to hit that points target, you'll have to carefully plan your every movement. Think you're up for it? Check it out below.

Click here to play Windows of Opportunity! What level were you able to get to in Windows of Opportunity?