Thank you! Hats off to you for beating the harder difficulties and solving the ciphers. Not to be too shameless, but if you enjoyed the ciphers, you might like our gbjam 12 entry, which is entirely solving ciphers like those (and this game is a prequel to that game in the ness/chris/ollie gbjam cinematic universe).
Spoilers:
There are three end screens for finding the treasure, depending on how many steps it takes. There are endings for digging in the wrong place and for going to a sudden death tile. Finally, there are endings for solving and failing to solve the cipher puzzle.