I had actually be toying around with doing a cryptogram puzzle for another game concept separate from the jam, so it was exciting to see this.
I think despite being built in a more modern engine, it really captures the Game Boy spirit. Navigation was a little bit of a challenge, but I think that is to be expected with the limited control scheme.
My only bit of feedback is I think the puzzle screen could've used a little indicator of how to navigate back to the room as well as a "blank" letter for when you misinput and wanted to reset a certain symbol.