Super Mario World anti-piracy screen

so i noticed all the anti-piracy screen videos and i decided to try it out myself
i tested SMB 1, LL, 2 and 3 before this but those ones were either lame or they just didn't boot up
so what i did was i went into my emulator settings and changed it so that the anti-piracy measure would activate and here is my findings
so the game boots up as normal, when you start the game almost everything is the same aside from an anti-piracy message replacing the standard intro message
on the Yoshi's house level, the birds are gone and yoshi's message replaces "bowser" with "pirates"
the names of every other level has been replaced with "ILLEGAL CARTRAGE"
Yoshi's island 2 is not accessible, i tried pressing all the keys and nothing happened
in Yoshi's island 1, the music had been overwritten with silence and every sprite was gone, enemies, yoshi coins, hidden powerups
all the powerup blocks had been replaced with a coin block and the 1 up block replaced with a normal turn block
after recording this i tried hacking in a powerup (by changing mario's powerup state because spawning a mushroom didnt work) to try and reach the pipe that takes you to the underground section and the pipe didnt work and all the message blocks were replaced with the same anti-piracy message
in the Yellow switch palace level, once again all the sprites (namely the P-switch) had been prevented from spawning and the music was overwritten
and when i pressed the yellow switch, the game threw an exception, crashed and brought me to the anti-piracy screen
from that point all you can do is reset or turn off the game