Outcome favorable! (after finally cracking the code)
I see in the comments that there's a disable-timer. Toward the end I would have liked that. I did complete it using only the timer mode, but felt a little rushed for time. Because of the way the core mechanic works, if you haven't seen the screen before: you need to have some way to recall the differences. Solving later riddles potentially requires more playthroughs with the timer on.
The SFX, graphics, code, and everything are on-point! Fantastic job, as always!