Well that's pretty impressive.
MOST impressive.
Quite the display of electronics knowledge. There's certainly more going on there than efficient use of space.
Here's my favorite comment from gizmodo...
"The space time continuum is intact FOR NOW... but if someone actually inserts this into an NES then we're screwed.
Actually they'd have to blow in it first. Then push it to the left. Then sometimes jam another game on top of it to keep it down. THEN the space time continuum is screwed."