It starts visually glitching out after 10 seconds or so, for me. Doesn't really ruin the experience, but as it appears to get more pronounced with time, I don't think we'll reach infinity. :)
Funny when I read the word "glitching" I assumed it would be a framerate hitch, which might be cause by GC, but I did a quick timeline grab and it seems OK for desktop. Collects about 12MB every 10-12 seconds. That might have more of an impact on mobile of course, especially Android.
I'm having that kind of issue with a game I'm working on - in my case I'm being way too cowboy about creating and throwing away JS objects for particles (only in 2D on a canvas) and it's causing GC framerate glitches on Android.