Very nice! Its an enjoyable experience, and I love the style of gameplay. It's rare to see a 3D game in the Jam (and for understandable reasons, its a lot of work), even less so of this quality, the fact that 2 people managed to pull this sort of a thing off from scratch is astounding - You have my respect!
Of course, things could use a bit more polish. Graphics feel a bit plastic-y, though its fair if that was done to make the game feel more old-school, then its nice.
Overall very solid game.
I hope many others get to see your work as well. Good luck!