The concept is simple, but really fun! You should totally continue it! Nothing much to add :)

Very cool! Maybe by assigning letters to different tones you could make a game where you form words using sounds.

I was confused when i started because i was using 0 and 1 but then after clicking in the screen i see that the numbers down bellow now started changing , cool concept fo a game but the only 8-bit i see was the text and i think the sounds, but as i said, after discovering that i needed to click i started playing a lot.  n_n

Wow, very interesting concept and great execution. Maybe even something to buildup on after the jam with harder difficulties like longer sequences or (if you want to leave the idea of binary behind) more tones. The only thing that would be great is an online scoreboard, but I guess that's not something to add in a 3-hour game jam xD. Still: Great game, especially considering the fact that you made it in just 2 hours.