Why did the first game of Tetris use letters instead of blocks? A. Alexey did not think to use blocks B. . Alexey thought letters were more fun C. Alexey's screen could only show letters D. Alexey wanted to teach people to read

C. Alexey's screen could only show letters

The first game of Tetris was created by Alexey Pajitnov in 1984 for an Electronica 60 computer, which had limited graphical capabilities. As a result, Pajitnov used letters instead of blocks to represent the different shapes in the game.