An unused 5-up logo can be found in the game's data. When used in game, the logo doesn't show up correctly. You can get a 5-up by bouncing on Wigglers, or by using a Game Genie code. It's fully coded, but the actual way the graphics are displayed is incorrect, as their properties are pulled from the code after the table with the score palettes. The 8x8 tiles used are incorrectly flipped horizontally and vertically.