Bitmagic's BitGame:

Extra Life

By SupSuper | 2001-03-18

1: While playing HotMaze lose as many lifes as you can.
2: Grab the ball quickly after you lose the last life, before the Game Over screen appears.
3: You can continue playing, even with 0 lifes.

After you do this once, it's tuff to do it again because the Game Over screen appears more quickly than before, but it's possible to play with -1 or -2 lifes (it's possible because I've already done it).