The 4 colors brownish/greenish reminded of the classic gameboy games, so I wanted to upsize while still staying true to the feeling of those titles.
This mockup is specifically inspired by the kind of "puzzles" that a lot of those games employed. Most of them were simple, but so difficult to guess, and whether as a result of bad translation or worse, bad design, most of them lacked any clues whatsoever as to their solutions, which would be -- as you could imagine -- maddening, to the point of insanity.
Can you figure out how to unlock the 4 crystals and enter the dungeon? (hint: it's not the key or the chests!)