At the top of the window, it should say Debug. Click that, then click "Game Genie Decoder/Encoder". Then type the code you want to use in the box that has the words "Game Genie Code" right above it. When you finish typing it in, click add to cheat list and reset your game with CTRL R and it should work. If you want to remove the code, click Tools, Cheats, and click the cheat you want removed, then click "Delete" at the bottom.

causes mario to jump insanely high with no collision, player can't do anything except reset,

when mario dies he goes really high and game softlocks, causing player to have to reset

same as sdfgdf

acts like normal until game is reset, then it glitches out, starts a new 1p game,

and the gameplay from the title screen is done as if a real person is playing it

removes all enemies

crashes the game when left side of the screen is touched

for some reason it messes up the title screen and its level but doesn't affect

normal gameplay, 1p and 2p options are invisible but still work

animation is only one frame and for some reason the sprite goes a few pixels up when walking too

does this cool sprite glitch on all terrain

causes the all terrain to be glitched yet still playable

disables smooth camera scrolling

LOTS OF COLOR CHANGING RAPIDLY

changes color palettes from normal smb to gb/black and white

causes some glitches with textures and stuff