Exactly. The lemmings fly off to the left, which was actually quite hilarious.

Then I went to a Windows machine and played until, at level 5, a timeout error occured.

Thankfully that happened or else I would have wasted too much time! :-)

I am really impressed by the jump in JavaScript performance over the last several years. One source said, if I remember correctly, it has been a 100x improvement! Crazy.