That was great! Binary is a very clever take on the theme, and the user interface as well as the instructions were very well designed. The confetti at the end was a nice touch!
As far as the gameplay: I personally really enjoy programming in 6502 assembly - it's what I end up doing when I'm burnt out on all of my usual projects. So, I really enjoyed this! (Although, it's much more like programming with a machine language monitor than assembly - but given the very simple instruction set, it wasn't nearly as annoying as that usually ends up being :-))
The one note I would give is that it would have been nice to have the ASCII table on a separate object. I almost didn't realize it was there, and was going to end up opening one on my phone. But once I knew it was there, actually flipping the page over was kind of painful, I had to contort my hand around. Anyway, a very small thing.
Great work!