Haha, sorry about that. q42.com is very experimental, perhaps too much so. It works really well in Chrome/Safari, okay in Firefox, and not at all in the lower-end stuff.

You can use the keyboard to go back and forth between steps.

We don't offer a HTML5 game engine yet, but we'll build one if we need to. Right now we're using a light-weight version of what we made for sarien.net.