Super Mario Bros. 3, released in 1988 for the Nintendo Entertainment System (NES), is one of the greatest games of that time. Even decades after its release, it is still the popular game of the Mario series.
Super Mario Bros. 3 retains the core side-scrolling platformer gameplay where you have to move to the right to reach the end of each level to rescue Princess Toadstool.
The ultimate goal is to defeat the Koopalings, Bowser's children, to rescue Princess Toadstool.
The controls in Super Mario Bros. 3 with the keyboard are simple as follows (I have played the game, tested the controls first, and then let you know):
Moves: Arrow keys
Jump: Z key
Select Game Mods: Select game mods by pressing the Shift key and then pressing the Enter key.
Start: To start playing the game after game mods is selected, navigate Mario to level 1 of the game and press the Z key.