Amazingly well done good sir! That clone took me back to playing that game in my aunt's living room when I was a child on the Atari. Very well done.
I did experience one issue and have two requests though.
Issue: During the intermittent music bleeps, I was experiencing a pop when the sound was initiated. This was on Windows 7 with the latest stable version of Chrome. I'll try on other variations later when I have more time to see if the issue continues.
Requests: Can you add controller support quick? Could you also release a Node version so I can download it and put it in with my Steam collection in the Steam app? I'm hyper organized and like to keep my stuff in one place. I would also love to see your clone among my games list. It would be a fun, nice surprise every time I fired up steam.
Edit: I did not experience the sound popping issue on IE11 with the same computer.