Maybe get it on IOS
I refunded the game for several reasons. First, this game isn't even optimised well for PC. I can run games like Doom and Battlefront perfectly fine, but this small thing stutters. Another problem is the hedious UI, which screams that this game was MEANT for a mobile device. Which brings me to my biggest argument to avoid this steam port: the game is FREE on iOS. It is baffling they ask 15 euros for it here, or even just for 3,50 during a sale. The game even runs better on my Iphone 5! The grindy nature of the game - which is farming coins to get better weapons and heli's to be atleast competent halfway into the game - better suits small bursts of gameplay while you wait on the bus or something.
As for the game itself, I already adressed the repetitive nature of it, but I should also write about the overly simplistic controls. It's not analog, and far too limiting in your options when it comes to movement and engaging combat. The weirdest choice the dev has made, has to be the inability to fire on command. As of right now, your heli automaticly fires at nearby enemies, but considering that your ammo can run out and that you have to spent coins to get more ammo, really seems unfair for those just trying to save money to get better equipement.
I did recommend the first game, especially since I bought it on Steam for only 60 cents, but paying anything more than zero cents for this doesn't seem right to me.