Here's a basic implementation of a simplified version of Plants vs Zombies game using JavaScript and HTML. You can copy the code into a single HTML file and open it in your browser to play the game.
Plants vs Zombies
This implementation generates a random grid with plants represented by plant icons and zombies represented by zombie icons. Each cell in the grid can be clicked, triggering different actions depending on the content of the cell. In this simplified version, clicking on a plant will display an alert indicating that the plant is selected and ready to attack, clicking on a zombie will display an alert indicating a zombie attack, and clicking on an empty cell will display an alert stating that there's nothing to do.