Sure! Here's a simple example of a warfare game with sandbox, normal, easy, and hard modes, implemented in a single HTML file using JavaScript:
Warfare Game
In this example, the game board is represented by a grid of cells, where each cell is a clickable area. The `createBoard()` function generates the grid based on the `gridSize` variable. The `cellClickHandler()` function is responsible for handling clicks on each grid cell and performs different actions based on the selected game mode.
You can customize the different game modes and add your own game logic inside the `switch` statement. Additionally, you can style the game board and cells using CSS to give it the desired appearance, including using pictograms if you prefer.