very unbalanced. first 4 level you can use your pistol(why the fuck i cant upgrade it) only heavy turrets and use 2-3 barricade then store money for "pigeon" and 1 medic and level is cleared. 5 and final level you need quickly install 1-2 barricade then upgrade generator while he dont give you for 1-2 tic 500$ for heavy turrets. after that, try to alternate between pumping up the generator and installing heavy turrets to the cap and getting $1,500 for 2 ticks. From now on, alternate between gunner and pumping the generator to the maximum. To clear a level, place a "pigeon", a medic and gunners in this order. There is no point in upgrade any of them. Yeah, at the final level, keep an eye on the number of barricades and don’t forget to shoot yourself naturally. for fuck sake my fingers hurt from this shited control