Dot Link is a classic board game and the best Dots & Boxes player on App store and iMessage.
You can play with mocha (device) or with your friends on iMessage.
Two players take turns drawing lines between dots on the game board. When a player draws a line that completes a box, the player "owns" that box. Whoever owns more boxes when the game board is full is the winner.
You can choose a level which is unlocked.
Win level in specified time, you will see countdown top of the board. Than the next size will be unlocked.