I don't know what it is then. How much ram do you have? And what browser do you use?
I really don't understand then. Is the system windows? Must be some mac problem then. Stupid mac. I have an iMac from almost 10 years ago. It's a good computer but sometimes it has some weird stupid stuff that only apple can think about -.-
This said, I don't understand anything because I'm no programmer, but my brother is one and says that a game like this should not crash for memory, normally, because it should not ramp up so much space, even after 20 loops. I don't know if it's true though. I repeat. I know nothing of this stuff :/
Oh well... I'll try playing on safari and see if it changes anything