Algodoo

Totally useless honestly, but it looks cool!

Carries 8 boxes, it's a little too heavy tbh, but works.

Just hit the clutch and let it start idling, no need to throttle

It has 3 movement patterns - walk, jog, trot

X to start (hold until it raises)
C to toggle clutch
W to jog, Shift+W to trot
S to (try to) brake (and probably fail miserably)
F (hold) to kill the engine and lay down