Tap on a colored circle and drag it on the board to color every gray circle. There will always be at least one multi-colored dot that you must go through to switch colors! Make sure you go through the right way. You also need to end up at the other colored circle. 

If the board isn't filled with color, you need to restart. How many boards can you fill?

For a tougher challenge, try the harder levels on the main menu.

How to play Fill Multicolor on your phone

To play Fill Multicolor easily any time, you can add it directly to your phone as an app. It’s a great way to play without worrying about losing your game save data.

For iOS devices, simply tap the "Share" icon in Safari and select "Add to Home Screen". For Android devices, tap the “Menu” icon and select "Install App".