Graphics and environment are key. i think the ghost drones are a core mechanic here.
You can just start playing without downloads, you use on-screen buttons to move, aim, and shoot.
You control your character with on-screen buttons for movement, aiming, and shooting. The enemies get tougher as you play.
Quick strategy is to use cover and high ground. You must use swift reflexes to survive.
Q: What controls do i use to play?
A: Use on-screen buttons to move, aim, and shoot.
Q: What is the main objective?
A: Defend territory against ghost drones.
Q: Are there any stated features?
A: Enemies get tougher as you play.
Q: What is the main mechanic?
A: Ghost drones are a core mechanic.