Here is an example of how the game can be implemented as a single HTML file using JavaScript:
Food Fight!
Someone stole your pizza ingredients to make their own pizza.
Defeat the boss ingredients to win!
Tomatoes
Onions
Pepperoni
Mushrooms
Pepper
Cheese
In this game, you are on a mission to retrieve your stolen pizza ingredients. You need to click on the ingredients displayed on the screen to defeat them. If the ingredient was stolen, it will be removed from the list of stolen ingredients and added to the list of defeated ingredients. If you click on an ingredient that wasn't stolen, you will receive a message stating that it's not an enemy ingredient.
The boss ingredients, Pepper and Cheese, are represented by larger and red-colored text to indicate their significance. Once you defeat all the boss ingredients, a congratulations message will be displayed, indicating that you have won the food fight!
You can copy and save the code as an HTML file and open it in a web browser on your smartphone to play the game.