First of all, it is a risky move to make a 3rd person shooter for a jam... There are so many things that can go wrong with the controls. For example, the character doesn't aim where the crosshair is... It would need ray-casting and some other calculations to make that; but in this game it's bit off...
The other thing is the sensitivity. For me the the aim sensitivity was way too high, and there doesn't seem to be an option to change that; and having controls configured badly, can make the game a lot less enjoyable.
The cutscene in the beginning is really cool, a great start for such a game. The gameplay itself is good, but I personally couldn't figure out how to get more ammo.
Also let's not forget the fact that the game looks really nice.