So far I am lvl 55, unlocked all weapon upgrades, and have reached lvl 30 in the “mission” mode. With that I think I have a well rounded and informed opinion about this game. Weapon enhancements are honestly the key to surviving the later stages as initially, if your style of gameplay is akin to mines, you will be anxiously waiting for Turrets and the Air bomb secondaries early on. You’ll quickly learn that both the air bomb and turret secondary are stall tactics and the weapon upgrades are far more useful in destroying the zombies. You don’t feel the upgrades in the weapon until it’s maxed out because it seems as if the zombies also get tougher as you progress through the stages. Overall it’s a four star game, will update the review after there is an update that gives more levels, perks, weapons, (maybe even permanent weapon enhancements - chance to ignite, shock, etc...)etc.. as it stands it’s a decent game for a few hours. Maybe about 6-8 hours before everything is completed. Enjoyed the game but it too short and lacking content for a 5 star review. Definitely looking forward for more content in the future. I’ll be waiting.