Follow your heart and find the hidden 3 letter code:
XPMMBIWZ BPFPICPC CRPMTDXX RVUYJBTZ FBTXGMWI AWKISAIL ZCFMIVPM
RABCC RABCC ZALBH ZZKAH ANUME > AMTLE PIDON PHCNN CBBFL CBBFL
Puzzling Stack Exchange is a question and answer site for those who create, solve, and study puzzles. It only takes a minute to sign up.Sign up to join this community
The instructions tell us
that we should trace the message "your heart" on the keyboard. The info screen suggests that each key press will use rot25 for the pressed letter and all the adjacent ones (rotating each letter backwards A->Z, B->A etc.). There is only one place where to start the message
After that we continue finding the next letters in adjacent squares
In the picture above, we have to choose carefully between the two possible R, because only one of those makes it possible to advance to an H next.
Here we notice that OP has also hidden their own name in the puzzle. Again, we have to choose the E which allows us to advance the message.
And we finish with the same square with which we started giving
Inside the heart symbol, we find the hidden code: PSE
Not an answer yet, but I'm writing down everything I notice and hoping it'll come to me
It looks like a lot of the letters are just shifted back one along in the alphabet (assuming it loops so ...uvwxyzabc...). The first and last rows aren't shifted at all though.
RABCC RABCC -- 0 0 0 0 0
ZALBH ZZKAH -- 0 -1 -1 -1 0
ANUME > AMTLE -- 0 -1 -1 -1 0
PIDON PHCNN -- 0 -1 -1 -1 0
CBBFL CBBFL -- 0 0 0 0 0
The screen isn't the same size so I'm not sure how the rule from the info screen applies exactly. It could be scaled up but I noticed the second to last line AWKISAIL looks a lot like the OP's name and originally this was a story about them. Lets see if that looks like a key.
AWKISAIL > AVIGRAIL 0 -1 -2 -2 -1 0 0 0
Not sure there - might just be chasing a red herring. Shifting everything by one as in the previous example (just expanded) gives:
Wow, not helping in the slightest. What I was hoping for, from the "follow your heart" clue, was something like HEARTABC where ABC would be the three letter solution.
I feel like the AVIGRAIL bit is closer but I'm not yet sure how the rule translates.