///This script works only on gm6

CREATE EVENT
=============
access = 0
cheats =  3
cheat[0] = 'samplecheat'///enter here your cheats!
cheatcode[0] = 'room_goto_next()'
cheat[1] = 'samplecheat2'
cheatcode[1] = 'lives += 100'
cheat[2] = 'samplecheat3'
cheatcode[2] = 'score += 100'
cheat[3] = 'samplecheat4'
cheatcode[3] = 'room_goto_previous()'
======================================
STEP EVENT
======================================
if (keyboard_check(vk_home) and access = 0) {
access = 1
keyboard_string = ''
}

for (i=0;i<=cheats;i+=1) {
if (string_copy(keyboard_string , string_length(keyboard_string )-string_length(cheat[i]),string_length(cheat[i])) = cheat[i]) {
if (keyboard_check(vk_enter)) {
if (access = 1) {
execute_string(cheatcode[i])
show_message('Cheat enabled')
access = 0
}
}
}
}
if (keyboard_check(vk_home) and access = 1) {
keyboard_string = ''
}