EDIT: The bug seems to be related to Chrome. If I open the page in Firefox, the game runs fine. Not sure how to sell things, though.
The character keeps spazzing out, and after about two minutes, I get a long error message from my browser and the game freezes completely. Haven't had this error happen elsewhere, so I believe it's related to the game.
I need to ask, by the way, am I supposed to be able to control the character? I don't know how to do anything, since I don't see any mention of controls or instructions of any sort.