The motion blur was something I noticed right away. Most people hate it, please add the option to remove it. Enemies aren't introduced in a healthy amount to get used to, randomly I would be fighting ranged cats that come in multiple groups and other times it's only turrets and sometimes it's only cats with melee that are easy to deal with.
The main problem is the lack of a ranged tool at the start in an FPS where you have so little HP and little ways to heal. It's good to hide weapons through a map, but you have to at least start with a weak pistol, even if it is weak, it's better than nothing.
I think it was the motion blur, but the movement felt clunky at times. I really think it was the motion blur that was the cause of it since it was pretty slight but it was noticeable. Needs more sound effects for the enemies and footsteps, to make them more apparent and stand out more.
The graphics are amazing, nothing bad to say there. You did a really great job on them.
You did a really great job, there is stuff you need to fix and add, but other than that, it's pretty good.