It feels wrong to take away a point for originality when it's like SUPERHOT, because SUPERHOT was such an original masterpiece, and this is a great twist on it... however it is a lot like superhot. Shooting things in slow motion, lining up your shots for penetration, the colour scheme, the brief all caps messages, all give a very SUPERHOTy feel.
I think the big challenge for me was that it feels terrible to lose a run because you have no bullets and you just have to sit there and wait (or restart). It's fine because runs can be restarted so quickly, but it feels like there needs to be some way to salvage the run. Maybe a hidden bullet or something (which would significantly slow down the run to acquire, but could still get a win)
Overall great entry. 9/10