I made my Pac-Man game with the help of this article: http://www.gamasutra.com/view/feature/3938/the_pacman_dossier.php?print=1 Was really helpful for me.

You can shoot portals with right and left mouse button and if both exist and you move into one, you come out of the other. The game crashes if there is only one and you move into it though.

Is it just me or is the escape button not working with HTML 5? For example in this scenario, I can't leave the code view with escape. (x works). Not sure if this was always the case, but right now, it doesn't seem to work.

In the HTML5 version, you can't leave the changing time window with a click on the escape button. (Don't ask me why.) You can exit it with a click in a corner. The displayed time doesn't fit in the image sometimes. Drawing something on images also look very different. With large objects like the ovals in the change time window, it looks better. However, the background image doesn't look very nice in the HTML5 version if you zoom in. (The circles and lines are different.)