There was something really enjoyable about playing your game.
I really like the sense of absurdity and imagination in this game, which especially showed on the second stage (what happened to the return vehicle??). Luckily for me the aim of the turrets trying to shoot Winston down was terrible, but a bit more difficulty could have made the game a lot more compelling. I actually did enjoy the first level and just going around exploring, but of course marking the locations of the parts on the map is a bit of a giveaway. It might have been cool to first have to find clues that then reveal the locations of each part on the map. Some suggestions I could give you are to pay more attention to the scale of objects in your game, which just felt a bit off in most cases. I think you could emphasise Winston's size by placing the camera target some distance above him. I know that animation is very difficult (and I am by no means anywhere close to being an expert) but I think you could improve the movement a lot by also articulating the spine and not just the legs (the tail already bobs up and down but some left/right motion would also help). If you're not already aware of it, try googling 'quadruped walk cycle' to see a reference of the different steps most four legged animals go through as they walk. The fact that the camera and Winton's rotation are locked together with the mouse movement means you never get to see Winston from another angle, which is a shame (and his rotation is a bit jarring, since its not tied to an animation, but I think that's something that requires some advanced techniques to do properly). Finally, I got the impression that some materials in the game were more detailed whilst others were very plain, so I guess sticking to a more consistent style would be good if possible, then again, you may just have run out of time.
All in all, I think you really had to master a lot of concepts to get to this point from having no experience with Unity, so great job!