Decent
Campaigns are far too easy, which I don't exactly mind but I wish there were more. I find many of the challenges to be poorly thought out, the speed challenges in particular. Take for example the KAR-98k, the speed challenge is 5 targets in 4 seconds. Maybe I'm doing something wrong but I can't even fire twice in 4 seconds with the KAR let alone 5 times.
I have faced this problem on every single speed challenge for every gun so far. The game lacks depth, I find myself spamming in the warm-up room to get gun challenges. Overall it is a decent game, there is much more you could do with this though.
I look forward to a sequel if you're planning on making one, and I hope you value my criticism.