I find lvl 19 and 20 far to random, 19 the problem is the uncontrolled center it's absurdly unrealistic. and on 20 the 2 rightmost lights have to be left green the whole time or traffic backs up far far to fast, I passed both levels by leaving all lights green and just trying over and over till luck won through.
would have rated higher but the game bugged out and lost a ton of my progress while I was on the last achievement. It forgot how much I had unlocked and I don't feel like playing for several more hours just for the badge...
the little dotted line for aiming is massively inaccurate, had to take away another star for it, sad to say, but it's intensely frustrating to watch my attacks miss when they really shouldn't be.
Also, the chopper couldn't fly through an overpass sign, that's total crap. Overpass signs are made from an aluminum titanium alloy and wouldn't break apart like this, they would make the chopper crash in one hit. try and keep at least a tiny bit of realism please.
Having now reached maximum upgrades, I find myself struggling to beat the game.
Problems I've found. My car is wider than it feels. Getting a zombie on the hood and having to shoot it or smash into something, means I get to choose between not having a window anymore if I shoot it. or losing all my speed and causing damage by rear ending something. It's not ideal. IMO beating the easiest difficulty shouldn't be a huge pain in the ass.