Mozilla has one and I'm sure The5K had a few.

Edit Mozilla's uses the nonstandard <canvas> tag.

Well it looks awesome, but I really don't feel like installing Opera. FireFox I got 10FPS but couldn't move and IE I got 1FPS.

I'm getting an average of 4 FPS in Safari (and the keys work) - but it freezes Camino.

Yay! 3fps (FX) and 12 fps (Opera) here. I'm wondering how fast this might run with the canvas tag. I might do some experiments later, but not until at least the weekend (exams and so forth). [grin]

Edit: I get about 8 fps in SeaMonkey... Maybe it's just Firefox that sucks? ;) Perhaps it's my extensions.

The Mozilla Raycaster uses

  onkeydown="press(event);" onkeyup="release(event);"

I see yours take no parameters.

I was wondering, how did you implemented the door opening mech?