Sure, here's a simple game where you tap on gold coins implemented as a single HTML file using JavaScript:
Tap on the Gold Coins!
In this game, gold coins are represented by a simple CSS class called "coin" which utilizes a coin.png image. The coins are randomly positioned on the screen, and whenever you tap on a coin, your score increases by one. The current score is displayed at the top of the game area.
You can save the HTML code in a file with a .html extension, and make sure to have an image named "emozi_all/coin.png" in the same directory as the HTML file for the coin background. Open the HTML file in a web browser on a smartphone to play the game by tapping on the gold coins that appear on the screen.