Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript and enclosed in script tags. This game is inspired by the classic game "Contra" and can be played on a smartphone.
In this game, you control the player character (represented by a pictogram
👾) using the left and right arrow keys or the "a" and "d" keys on your smartphone keyboard. The player is restricted within the game container, and you can move it left or right within the limits.
Please note that this is a simple game implementation for demonstration purposes and can be expanded upon to include additional features such as enemies, obstacles, scoring, etc.