How to Play Tetris Online: A Simple Guide

Visit an online gaming website that offers Tetris, such as Miniclip.com or TetrisFriends.com.

Click on the 'Play' button or link to open the game.

Select your game mode. Depending on the website, you may be able to choose from variations such as Marathon, Ultra, or Time Trial.

Use your computer's arrow keys to move the blocks left, right, up, and down.

Rotate the blocks by pressing the 'Z' and 'X' keys.

Use the space bar to instantly drop a piece.

Create full horizontal rows to clear them and score points.

Clear as many lines as possible before the blocks reach the top of the screen.