FEATURE:
+ Total 40 sample levels
+ Total 13 characters (1 main character and 12 enemies)
+ Animation use sprite sheet image, easy to reskin character
+ Upgrade gun power and the barricade in Shop system
+ Make money with Unity Ads and Admob (Show ads on Gameover/Victory, watch rewarded video)
+ Make money with IAP (Buy coins and Remove ad)
+ Work on Mobile and PC
+ Total C#, easy to learn
