Good effort. Some tips:
1. If the game doesn't rely a lot on 3D elements, you can use 2D Unity setup. I know this one isn't using that since the game glitched once and all characters went into the floor. And at just 4 health. Talk about saved from death, but also glitched.
2. In a jam, preferably don't ask people to use a controller. It's because almost always everyone is playing someone else's game for 5 minutes and moves on. This is a minor roadblock in that. BUT if the game REALLY benefits from it, it's okay. Tho, in this case you could have simply used the mouse as well. My game is also a shooter style game, and I set the shooting to mouse, very precise.
3. If using controller, don't involve keyboard back into the mix. A combination of two inputs isn't great.
But otherwise, good effort.