Sure! Here's an example of a game where you need to tap falling dots on a smartphone screen to win. The game is written in a single HTML file with JavaScript enclosed in script tags:
To play the game, simply open the HTML file in a smartphone browser and start tapping the falling dots. The objective is to tap 100 dots before 5 of them reach the bottom of the screen. If you achieve this, the game will display a winning message. If you miss 5 dots, the game will end and display a game over message.