Use the explicitly named completion object as a reference.
The card is a requirement
Zombie Hunter Assault describes fighting zombies and says a glowing card is needed to finish the level. That makes the card more than incidental scenery. Read the current objective and look for how the game identifies the required object. The dramatic survival language does not establish that defeating every visible enemy alone satisfies the completion condition.
Know the documented controls
The record lists WASD movement, F to pick up a medkit, space to jump, left mouse to shoot and left Shift to run. Confirm the active mapping before interpreting a failed interaction. The medkit input does not automatically tell you how a card is collected. Use the actual prompt for that object rather than assuming every pickup shares the same action.
Check the state after discovery
When you believe you have obtained the card, inspect the game's confirmation and the instruction for what comes next. A visible glow can help recognition, but disappearance alone may not explain the full level state. This article provides no tested card location, combat route or equipment ranking. It offers a way to preserve the explicit completion requirement while learning the documented inputs. The fictional zombie premise has no verified content rating here, so choose another listing if that theme is unwelcome.