This is probably one of my favourite 3D submissions of this jam. The movement is extremely smooth, probably the smoothest 3D movement I've seen so far, and it's extremely fun to control. I really love all the little animation details, like mentioned before the level emerging from the ground, and things like the tank death animations. Although the mechanic of killing things and using their parts is a common take of the theme, you've pulled it off extremely well here with a great armor mechanic. Your game's gameplay is very well polished and I enjoyed every second of it.
The only thing I would say is that the enemy projectiles were quite difficult to dodge as they were extremely fast (especially the boss) and there wasn't much of a warning when they were about to shoot, making it very easy to lose health early (Which for me kind of takes away from the fun a tiny bit). You can add some very basic telegraphing by having the tank's gun scale right before it shoots as a little warning sign, and then have the bullets a tiny bit easier to dodge (Maybe that's not how these kinds of games work, but I like it when I'm able to avoid taking damage). And, though I understand there was a time constraint, a tutorial would be nice as I forgot some of the controls later.
This was very, very fun to play. I'm hoping it continues to do well in the jam!