being able to set the frame.
for example

if rewindplay = 1 then set_frame = CurrentFrame -1

Kinda hard. Making things go backwards. And it'd be better off as a function with CURRENT_FRAME being a constant with the value of the current frame...

get camera position? or actually even let us control the camera? right now set camera is just showing it for one frame, I can't override the game's camera.
If not letting me implement a camera like Myth's, at least make it so I can do 90degree jump left/right with shift so that I can switch to other side fast.

set_camera_pos()
set_camera_lookat()

Those both inside the Camera loop in 3.1 beta.

I like the belt idea a lot. And I liked veb's idea a lot too. It would be cool to be able to change gravity, friction, stuff like that. Especially to make it easier to make mods using no-fric, no-gravity.

gravity is editable isnt it?

It is not, however you can fake it by apply an upward force vector, equal to the gravity's force. However the exact gravity force number I have no clue what it is.

I think the exact gravity force is 0(x) 0(y) -9.82(z)

Empirically, it's pretty much -1 m/s^2 exactly, by default.

Based the gravity I said on a mod Hehe