Here’s something totally bizarre that you might it might not care about.
The other day I brought up Metroid on the Nintendo Switch NES app (the one that lets you play some NES games with an online subscription.) After playing for a bit, I wanted to show him the Justin Bailey code. But I couldn’t remember it exactly at first. So I tried it in various cases, and when I enter the code with all lowercase letters, it crashed the game.
No idea if it’ll do that for everyone, or if it did that on the actual NES, but I tried it a few times and it crashed everything.