Riley and his glasses were back in class today, still feeling a little rattled after the recent events. But, he figured that was going to be a common thing.

"Hey guys," he said, nodding. "Nothing too strenuous today. We're still gonna play video games because I figured it might be a good stress reliever but it's nothing violent or difficult. Today, we're going to play Tetris. Tetris is a tile matching game where the aim is to create horizontal line of ten blocks without gaps. When you create the line, it disappears. As you level up, the tiles fall faster and the game gets harder. Let's see how well we can do, okay?"

With that, Riley ended the lecture and got the students started on Tetris.