You’re almost there! So to get the final clue you had to revisit the first 2 levels. To do something with it, you’ll have to revisit the third level. Let me know if that helps!
ok so I managed to figure out that one of the map tiles in the game is a 4 digit hex editor and I inputted dead. and then a crash screen showed up but I think thats what happens when you beat the game, right?