The alert has been given, the virus is on the loose, the lab will be quarantined in 60 seconds. Shoot anything that blocks your way and escape!
The core gameplay revolves around the arcade-style shooting mechanics. You must quickly and accurately shoot the various zombie enemies that approach, aiming to take them down with as few shots as possible. Different colored zombies require varying numbers of shots to kill, forcing you to carefully manage your limited ammunition.
A key challenge is the limited ammunition capacity and the fact that you can only reload your weapon once the current magazine is completely empty. This requires you to time your reloads carefully, keeping an eye on your remaining bullet count and deciding when to reload versus continuing to fire. Mastering this reloading mechanic is essential for success.
Beyond just surviving and reaching the exit, the game encourages you to chase high scores. You can earn points for each zombie killed, as well as by collecting power-ups. The game's short, score-attack focused nature makes it very replayable, as you strive to improve your high scores and perfect your shooting skills.
Reviews note that while the game is easy to pick up and play, it has a high skill ceiling. The difficulty ramps up quickly, with the speed and number of enemies constantly increasing. Succeeding requires not just quick reflexes, but also mastering mechanics like reloading and managing ammunition. This challenge and sense of progression is a big part of the game's appeal.