Tried it out on my MacBook and it ran well. I did the tutorial and played a single game. Nicely polished game and didn’t encounter any bugs.
One small criticism. I found it didn’t have much replay value. I first noticed this when I had to hit 15 targets in the tutorial. I found that number a bit excessive. Finally I found it a bit fatiguing using my mouse as perhaps it’s more suited for a touchpad.
Perhaps for your next version add a novelty. For example imagine you’re several stories up, the faces are on the ground level moving slowly, and you’re dropping things trying to hit them. You need to lead your shots because it takes time to actually hit the target–like a bird trying to poop bomb people below.
Thanks for sharing! Also nice work with the networked high-scores.