This was a fun mechanic. The full speed was completely uncontrollable for me so I basically had to play only in bullet time. It felt like the only case where it made sense to switch to full speed was when I had a bullet in the air and just needed to move forward. With that in mind i think it would have made more sense to have bullet time be the default and have you click to fast forward. Or slow down real time a bit to make it more manageable. I also felt that having to click the gun to change your velocity was odd. I was expecting every shot to effect velocity.