Tetri unblocked is a puzzle game that kids can play at school for free. The mission that you will encounter in every level is to remove as many lines as possible. To create these, you have to arrange the falling shapes into their place correctly. One small mistake also can make you lose Tetri. Aside from that, if you stack them and let these items touch the top of the screen, you will receive the same result. Let's get ready to achieve the best score! Good luck!