I found interesting the interpretetion you gave to the theme. The game is simple with a clear objective and oposition. I would suggest to explore more on the audio aspect of the game so it makes ir feel more whole. Maybe a little truck sound when accelerating the truck, simple footstep sounds, maybe background music in loop.
Congrats on trying Godot for the first time. I'm curious on if you had more time what would you add or change to the game?