Wide-eyed, Willis Gibson, 13, covers his face, leans foerward and gasps for air, saying, “Oh my God,” over and over again. He’s the first person to beat Tetris, the puzzle video game invented by Alexey Pajitnov, a Soviet software engineer, back in 1985. Thanks to a new technique, Gibson made it to the “kill screen” in level 157 – the moment when the screen freezes because the hardware and software have finally reached their limits. Normally, the pace of gameplay is so quick from level 29 onwards that no one manages to get much further than that. Henk Rogers, head of the US-based Tetris Company…