Progression

How to Get Money in Build and Kill Zombies

The official loop confirms that defeating zombie waves earns cash for upgrades.

Prepare for difficult encounters with repeatable checks rather than unsupported damage claims.

Treat every failed run as a small experiment: identify one weakness, modify it, and test again.

Spend cash on the failure point you can actually identify in a test run.

Use each wave as feedback for the next vehicle adjustment.