A 3D game with good art, execution and polish? that's very impressive for a Game Jam, and that's before even talking about the idea, which was very unique and fitting
Gameplay wise it's a steep learning curve, the game starts off being very frustrating mechanically, but once you get the controls down, it's becomes really fun, so fun in fact that finishing levels becomes pretty rewarding.
I think the bridges mechanic was a great idea, but because it's first and foremost a shooting game, make hitting the center count
I think that adding points to getting a perfect hit is a much better scoring system than just showing the timer
Overall enjoyed the game, well done!