For whoever can run it, it seems the following keys are checked: (non-numpad) 1, 2, 5, T, J, Q, W, all numpad keys including + and - and Shift. You guys probably already checked it, but maybe one of these will do something interesting?
As someone, who have tried the beta, I can say what worked and not worked for me!
Non-numpad 1 and 2 worked, as they switched modes between light balls and fists to shoot with!
Non-numpad 5 didn't work for me at all unfortunately. :sad:
Same with T, J and Q letters.
Q actually works, but in noclip mode only, which can be activated by pressing B. It makes you move faster in noclip mode and it can be useful!
As I mentioned before, you can enter into noclip mode by pressing B.
Numpad + and - didn't work for me.
Shift changes the way your camera moves in free-cam mode (which can be activated with numpad 1), so instead of moving around, you can change the position of it.
As I mentioned earlier, numpad 1 activates free-cam mode and numpad 2 (which is the only key, that for some reason recenters on Rayman's back), numpad 3, numpad 8 and numpad 9 disables free-cam.
A makes you move up in both noclip and free-cam, and Z - down.
And also D makes you enter into this vector (?) mode.