To complete a level, aim your weapon and shoot zombies using the least number of bullets. Consider the environment and use ricochet shots off walls for maximum effect.

You can use various weapons, including pistols, shotguns, and rifles. Each weapon has different attributes, such as power and ammunition capacity, that affect gameplay.

To earn more stars, you need to complete levels with fewer shots. Aim for precise shots and try to eliminate all zombies quickly while conserving ammo.

For tough formations, analyze the layout. Use the environment to your advantage by aiming for bounce shots or explosive barrels, which can take out multiple zombies at once.

The shooting mechanics involve aiming and trajectory calculation. Follow these steps: 1. Tap on the screen to aim your weapon. 2. Use the angle indicator to adjust your shot. 3. Predict where the bullet will hit, considering angles and obstacles. 4. Release to shoot and assess the outcome for adjustments.