The red and blue dots want to meet, but they don't have arms or legs that will allow them to move, but the dots are round, which means they can roll. You need to use a magic pencil and your ingenuity. To get the dots to move closer together, draw a line or shape for the balls to roll down and collide with each other. Go through the levels, the first six are already available and you can choose any one, without following the order, you need to go through everything to gain access to the remaining levels in Brain Dots.