You have to move and arrange the cubes in the right position to form a full line and remove that line. Random blocks will appear inversely proportional to the game level and only appear in the 2 lines with the highest squares. You have to calculate to get the best score.
Tip: Try to lower the lines to avoid random blocks appearing.
Random block output rate:
Level 1 - 4 Normal blocks
Level 2 - 4 Normal blocks
Level 3 - 5 Normal blocks
Level 4 - 6 Normal blocks
Level 5 - 7 Normal blocks