This game is bad. It's filled to the bone with ads. Every level ad, every time you upgrade ad. Even without the ads it would still be bad. One of the biggest issues is how the game is designed. It's designed in such a way where it feels like your units are capped because of their bad group path they do. Even if I play perfectly, I'll have 2/3rds of my units die just from randomly placed holes or saw blades for reasons.