Tetris is a puzzle game originally designed and programmed by Alexey Pajitnov. This Game Boy port was included with every system sold, resulting in the game becoming hugely popular.
This run by MrWint completes Mode B at level 9 as fast as possible, and improves the previous movie by 00:06.96 seconds. Most of the improvement comes from a glitch where the game copies the top few rows after line clears. For more details, read the submission comments.