Gun Idle is a game where money is the main thing. i found you have to click to shoot and collect gold for turret upgrades.
Click to shoot enemies, and collect gold to upgrade your turret.
The main feature is the upgrade system where you spend gold on your turret. You have to click to shoot and collect gold, and their are no other controls.
Quick tip: i discovered that you should focus on upgrading your turret fast. Most players use the gold to supercharge your turret.
Q: What are the controls? A: Clicking to shoot enemies is the control.
Q: What is the objective? A: Destroy waves of enemies to get gold.
Q: What is a stated feature? A: The upgrade system is a feature.
Q: What is the main mechanic? A: Click to shoot and collect gold.