First, open the game on your mobile phone, tablet, or another supported device. You will usually see a grid containing empty squares. Below the grid, you will find several block shapes that you can use block blast.

Next, choose one of the available shapes. Drag it to an empty area of the board or tap it and select a suitable position, depending on how your version works.

Make sure that the shape fits inside the grid. Every small square of the shape must occupy an empty square on the board. You cannot place a block over another block.

After placing the shape, check whether you have completed a full row or column. If you have, the completed line will disappear, and you will earn points according to the game's scoring system.

Continue placing the remaining shapes. Try to keep enough empty space for larger blocks and shapes that may be difficult to fit later.

The most important rule is to think before placing a block. A move that looks good at first may create problems for your next move. Therefore, always look at the entire board before making a decision.