Not sure if this is a bug or what...
This looks like it would be a pretty fun game, except for the fact that it pops a lag-spike every other second. Runs smoothly for one second, freezes for a second, runs for another second, freezes again... not really playable in Firefox. Runs slightly better in Google Chrome, but still skips every other second.
Still, a fun concept. I'll keep an eye on it to see if this issue is resolved.