No Enemies on Blobolonia

From Glitches

From the game A Boy and His Blob for the NES.

At the beginning of Blobolonia, the blob's planet, run all the way to the left until you can't go any farther. Toss a jellybean at the left side of the screen. If you did it right, the screen will flash the final boss screen for a brief moment. Now there will be no enemies at all on Blobolonia.

Taken with permission from Flying Omelette.