By now, you probably know about the new retro game that came to Nintendo Switch Online yesterday. Dig-Dug II, Mappy-Land and Earthworm Jim 2 have been added to the NES and Super NES Nintendo Switch Online library. However, they are not the only ones.
From time to time, Nintendo also adds special editions of certain retro games the company has added to Nintendo Switch Online, but it varies. For example, yesterday saw the addition of the Super Mario World and Super Punch special editions.
With the former, you can start with 99 lives, a fully unlocked world, and the makeover that Super Mario World sees as you complete the special world is already available. For the latter, all circuits, including special ones, are available.