Key features: 20 Unique structures to build!12 turrets, 4 traps, 2 amplifiers, gold harvester and a wall. All structures are upgradable (except walls) up to lvl 12, including 13th ultimate upgrade for turrets and traps, that you can unlock in later game! 100 Unique stages!4 different environments: snow world, desert, jungle and hell. Each contains 25 stages. 20 types of enemies!3 regular types and 2 formidable bosses per environment. While regular enemies can be met on every stage, bosses appear rarely, but can provide decent challenge with their skills and tons of hp! Deep combat system!It's not just damage and hit points, it's critical hits, armor and armor penetration, ailments: burning, bleeding, slowing, shock and freeze, ailment resistances and more! All structures, as well as enemies, have their fors and againsts! Highly adjustable difficulty settings!Enemy hp, armor, resistances, enemy amount, wave amount and more! You can make it truly challenging or, if you're having troubles clearing any particular stage, make it easier! Higher difficulty = more exp! 50 skills!Turret damage increase, cost reduction, ailment power, ailment duration and many other skills to spend skill points on! Clear stages, earn exp and level up to get more skill poins! Both intense and relaxed playstyle-friendly!The speed of battle can be controlled with fast-forward or pause buttons to fit your play style. Also, waves of enemies can be summoned early by pressing wave buttons in the bottom of screen.