Tetris Plus

In vs. mode, try to build a square around the professor, leaving 1 area of no lines above, and box him in. Doing so will prevent the professor from so foolishly climbing to his own death, and you can watch your opponent suffer. This trick can work wonders once mastered. Also: all excess blocks can be broken off by making the touch the spikes, as you can't lose without the professor's head touching the spikes.