Directions

1. Move the tetrominos left and right with the arrow keys.
2. Understand the different tetrominos.
   • I-blocks are useful for getting 'Tetris', that is completing four lines at once.
   • O-blocks for filling large gaps.
   • L-blocks for filling medium-sized holes.
   • J-blocks face the opposite direction as L-blocks.
   • S-blocks for filling small holes.
   • Z-blocks face the opposite direction as S-blocks.
   • T-blocks are also for filling small holes.
3. Use the spacebar to rotate the tetrominos to fit holes.
4. Completing the maximum number of lines at once, four, is known as a 'Tetris' and can only be pulled off with straight, long rectangle tetrominoes.