Sure! Here's a simple car game that allows you to drive on a mountain with smartphone operation. The game is implemented as a single HTML file that contains JavaScript code enclosed in script tags.
In this game, you control a car using touch events on a smartphone screen. The game interface consists of a mountain (represented by the colored background) and a car (represented by a black rectangle).
To control the car, you can touch and drag horizontally on the game screen. The car will move left or right accordingly. The goal is to reach the top of the mountain, which is around 95% of the game container's width. Once you reach the top, a congratulatory message will be displayed.
Note: This is a basic implementation to demonstrate the concept. You can further enhance the game by adding more features and graphics.