Spot the Difference Puzzle [level 1+]

dude i finish the puzzle but in the end appears like a error o idk what it means,I never solve puzzle is the first time, I don't know if it is normal or what I have to do. nvm i already discovered it

Oh, i already did that, but without / at the end, thank!

Maybe I am overthinking it, but the GA links have usually 5 characters... The 3 question are giving 2 letters and 4 numbers, which is too much... :D Or I am missing something? :)

edit: Ah, nevermind :D Maybe it was too early in the morning... :D but i see now the code ;) And although i did not entered any of them, I really enjoyed the puzzles. As a sign of gratitude, welcome to my 💙 ;)

I was thinking that you might have prepared this event 4 years ago, but only decided to do it just now. ^^

If you go back to the Japanese School Life GA, and click Next in the description it will take you to the rest.