Your objective is to lead the colored lines to the end. Sounds simple right? Well it gets a bit tricky. You need to do it in as few moves as possible, and sometimes you will have more than one colored line to bring to the end. At times, you will need to mix the colors, so if the end point is purple, you'll need to use both the blue and red lines together to create a purple line!
You can use your left mouse button or your finger to click on the lines and guide them (with mouse or finger) on their path. On the upper left corner you'll see how many moves you've used.
Tip: If you forget what color combinations there are, click on the colorful square at the top right corner of the game screen to see a table of colors.