At the beginning of the game, the player is prompted to choose a character, each with their own strengths and weaknesses. Once the player selects their character, the game begins.

The game board is a map of the school, with various rooms and hallways. The player must navigate through the school, avoiding zombies and searching for weapons and health kits.

To move the character, the player swipes left, right, up, or down on the screen. To attack a zombie, the player taps the screen.

As the player progresses through the game, the zombies become stronger and are more difficult to defeat. There are also boss zombies, which require multiple attacks to defeat.

The game ends when the player's health bar reaches zero. The player's score is based on the number of zombies defeated, the number of health kits found, and the time taken to complete the game.

The game is implemented using a single HTML file, with JavaScript code contained within  tags. The game features graphics and sound effects to enhance the user experience.