WorldNumber = $075f
It looks like you just want a world select game genie code. BTW, SMB has the most Game Genie codes available, for any NES game.
Start On World 2 YSAOPE, YEAOZA, PEAPYA
Start On World 3 YSAOPE, YEAOZA, ZEAPYA
Start On World 4 YSAOPE, YEAOZA, LEAPYA
Start On World 5 YSAOPE, YEAOZA, GEAPYA
Start On World 6 YSAOPE, YEAOZA, IEAPYA
Start On World 7 YSAOPE, YEAOZA, TEAPYA
Start On World 8 YSAOPE, YEAOZA, YEAPYA
Interesting side note, since the ROM is always located in $8000-$ffff...the Game Genie always sets the upper most bit, and therefore subtracts that from its calculation of the ROM address.
In short, the game genie code for address 075f...becomes 875f. There is no way to affect addresses 0-7fff. It is hard-wired to only affect addresses 8000-ffff.