Hi! I was able to complete the game, and I really liked the 3D environment, but the controls left something to be desired....
1st off, the camera zooming in to whatever surface you're looking at was incredibly disorienting and made me feel a little nauseous. I understand what you were going for, but maybe it would be better to have two modes? a roam around and find the pieces mode and then a static zoomed in mode when you're actually putting the thing together? Also you might want to limit the maximum and minimum camera angle when looking up and down a little bit. This prevents the jerky movement when looking straight up and down.
2nd, I don't think the vice needed an on and off setting. I know that's slightly more realistic to how a vice actually works, but it would be much more intuitive to just have the player place the object in the vice area and have it stay in place. If you're dead set on the on and off thing, the vice absolutely needs a clear visual indication of whether it's on and off. Also disassemble is not the right word here. the clock is already disassembled and you're preparing to assemble it...
3rd, it took a long time for me to figure out that the clock gears were on the ground. They're super tiny and out of the way. At the very least, it would be nice if the tutorial message mentioned that the pieces were scattered around the room (since it's a tutorial after all).
Finally, while I liked that the pieces lit up when you hovered over them, some more visual indications would have made it a lot more clear that I was doing the right thing. For instance, there were a lot of times where I was trying to put a piece on the clock and I had the orientation too incorrect, I'd let it go, and it would just fall. Perhaps a separate button for attaching a piece would also help with this.
Oh, and the gear physics was really janky. I had several times where a gear would just roll away forever... Not sure exactly what's wrong there, I'd have to actually look at your object movement code.
Overall good job! Any game that someone can finish and have some fun with is a success in my book. Good luck with your future endeavors!