Very nice, thanks!
It’s especially important to consult the manual because the controls ar not so straight-forward.
First of all your movement speed can be set using F1-F12 (yes there are 12 movement speeds haha). The lowest 4 are for sneaking and the highest 4 are for running.
Controlling your character itself is entirely done using the numpad:
8 & 2 for walking forwards and backwards
4 & 6 for turning left and right
1 & 3 for picking up objects (with left or right hand)
7 & 9 for using object in hand
5 for ducking
Note that you can’t turn and walk at the same time, so that’s a bit unfortunate. Apparently this was fixed in a later Windows release, but not in the DOS version.