I didn't notice what colour the shooters were but I found it much harder to spot and make a decision about an object - phone or gun (or coke can or wallet) if it was the same colour as the hand that held it.

So I was slow with silver guns or phones in white hands and black wallets, phones or guns in black hands. Where is the analysis of this reaction time. In fact I got shot a couple of times by white guys with silver guns, and I shot a few white guys with black phones.

Also some of the backgrounds made it hard to spot an object. I also found it a bit hard to "shoot" someone who was pointing the gun at the ground.

And the web connection was very very slow...