Once spawned, just activate the 4 windmills like I did to stop them at the end of the video and it will work already.

Controls :
- Forward, Backward, Left and Right allows you to move in the 4 direction, you can even hold them to keep going.
- Sneak and Jump let you rotate the cab.

The mecha is fairly simple, in concept but a bit harder in 0.5 sadly. Not sure if there is any way to make it as simple as the old one.