Did you try clicking on the game screen to lock you mouse in place? Or did you full screen it? Or did you try downloading the game to see what more it has to offer?
As I wrote in my second sentence of my comment: I didn't download the game, because I do not have a PC.
In the web version, I first tried full screen, but that didn't seem to work well, so I turned it off again. I clocked on the screen, but that led to wild spinning of the view.
Ah I see, well there's your problem haha. I highly recommend using a mouse when playing games on a computer otherwise you will always have a bad experience with 3 dimensional games.
Ah I see, I was confused because in my mind PC stands for Personal Computer. A mac and any other PC running any other operating system is a personal computer to me. I thought you were saying I am using someone else's, or a library, or a schools PC.