First of all glad you found it cool and also you nailed it with the slow thing. I don't know why I didn't think about it myself. the movement was on the update method... So yeah, rookie mistake XD
About the feedback I tried DX9 but almost everything turned black so I just went back to DX11. About the border shooting thing I'm aware but unfortunately I didn't find a solution, the problem is that the border is indeed in the way of your gun and the place you are aiming at. I tried disabling collision if the border is close but then you can see the bullet flying through the floor and it's weird. So I just left it as is.
Regarding the movement I know it's flawed. I did my best in the time I had. You also need to keep in mind that the game systems are complex and has a lot of things to it that are not easy to balance. Is difficult to nail the feel of a first person shooter that consists on flying around with a hook while slowing time and shooting stuff :P
But thanks for the feedback. You were spot on with everything!