I was unable to figure out how to get the pet to run, either in Firefox or in Chrome. I tried clicking everywhere on the opening screen, but nothing seems to work; and sadly, there don't seem to be any instructions anywhere -- I'm suspecting this works, but it's just unintuitive?

Not sure what I'm missing, but I think instructions (or an explanation of what browsers/platforms are supported, if this is a browser problem) would be really useful. Happy to up the rating if I can figure out how to play it!