Really enjoyed the game, with the shotgun I was even able to get a "fresh" result xD.
It took me a while and lots of fails to understand that I couldn't just shoot at my leisure, once I did then I started waiting for the ammo boxes to drop. One question, what were the black liquid bottles supposed to be, I didn't quite understand why they also gave me ammo.
One thing that I think you could improve is by giving the player some feedback of when the shots hit the cat, because most of the time you're looking at the cat not at the counter so I couldn't tell when I had hit him or not, maybe a screenshake or some particle system or something that would let me know that the shot hit.
But overall it was really good! The audio and music were amazing, especially when it really starts going, the whole theme was super funny, even the starting intro was very charming!