Really cool game, good job! The graphics were amazing for a 48 hour jam, and the movement and mechanics all felt nicely polished. I would recommend perhaps making a better distinction between the civilians and the guards. Also, I think it might be more interesting if you could make each mode (shooting and moving) completely separate, so when you're moving you can't shoot and when you're shooting you can't move at all? I don't know how the gameplay would differ but right now it doesn't seem very necessary to use the two different modes apart from switching the direction of your weapon, so perhaps that would make it a bit more unique/interesting.
Having said that, it was a great and original idea, well done!