[update] this weekend I add the new motion system (now the player can take a look before he enteres a room).
And the cube model is modeled and textured.
Some effects as sounds where added also. (see picture and new download)

Being able to tilt more than 90 degrees would descrease the player's sense of orinetation.
It looks like you add the door models in a room not when opening a door, but when you enter it only. that looks weird. Or are they lit weirdly?

Sometimes looking at a door not ahead, but to one side, lets you move straight from the door you're in to the door you're looking at, sometimes the camera will move to the middle of the room first. I didn't get that O.o

Other than that, cool, quick controls, nice Sound effects work as well, and I like the cubes.

I don't know if tilt more than 90° will be a enrichment (in the final gameplay) but I implemented it for test purposes.
The doors are created with the cubes but you're right the emissiv light was too low - changed.

The current movement is from the middle of the room to the doors.
The selected door opens but you stay in the actual room (to have a look if it's a trap):
You can now move into the new opened room or change to an other door.
Entering a room means always moving to the center - that's because of the gameplay (you will see later).

I changed the door-distance and switch the light on only if the new room is entered. I think this will make the players positions more comprehensible.

The next task will be to fill the rooms with objects, hints and traps...

"Entering a room means always moving to the center"
I unerstood the above procedure you mentioned, but while testing I'm pretty sure that at one point, instead of moving from the entrance door to the center first, I managed to move straight to another door, diagonally. I can't test it again here at work, but I might find the time tonight to see if I can reproduce this.
Maybe I was wrong and just quickly moved to the center and then to the door, I'll see.

1. you are in the center of the room (starting position)
2. you can move in the actual room to a door
3. you can move in the actual room directly from door to door (-> 3.)
or
you can move to the center of the next room (-> 1.)

ok, then I guess the diagonal walking was intended.

Thats really good. The sound and flickering of light adds a cool atmosphere to it.
I like it. But as mentioned above, rmeove the 360 view around thing o.o. Lost orientation of top/left/right etc in a few seconds XD


GReets
Rackscha

perhaps you need to add a horizont-panel (like in airplanes) XD