Ooh ok, ok, I didn't find that wc. I was just saying that because on the first try I took the coin but I ran out of time. I clicked Retry and started again but with a coin in the inventory (maybe global variables?).
I didn't try to see if the coin was still physically there, but it would be possible to get two coins and pass the game by paying one in level 1. That's why I was saying about the glitch.
Thank you for the reply!