Players can use the direction keys on the keyboard to move the blocks left and right, and press the direction keys to accelerate the falling speed of the blocks downwards. Players can also rotate the blocks to adapt to different spatial layouts. When a block falls to the bottom or overlaps with other blocks, it will be fixed in the game area.

In Tetra Blocks, players need to flexibly think and make decisions in order to place the blocks in the most suitable position. If the player is unable to clear the blocks in a timely manner, the game area will be filled with blocks, leading to the end of the game.

Tetra Blocks has multiple game modes, including Classic mode, Challenge mode, and Endless mode. In classic mode, you need to eliminate as many blocks as possible in a limited amount of time. Challenge mode provides a series of levels, each with unique challenges waiting for you to solve. Endless mode is a mode that constantly challenges one's high score record.