Sure! Here's a basic implementation of the game you described using JavaScript and HTML in a single HTML file.
To play the game, you can simply copy and save the code above into an HTML file (e.g., `game.html`), then open the file in a web browser on your smartphone. The game will be displayed with a grid where you can click on the cells to place towers. The cash amount and wave number are shown at the top. The game will continue until either all 30 waves are survived or you lose the game.
Note: This is a basic implementation and can be further enhanced with additional features and graphics based on your requirements.