Sure! Here's a simple shooting game implemented as a single HTML file using JavaScript. The game can be played on a smartphone and uses pictograms for visuals.
To play the game:
1. Copy the above code into a new HTML file (e.g., shooting_game.html).
2. Open the file in a web browser on your smartphone.
3. Use the left and right arrow keys to move the player (red square).
4. Press the spacebar to shoot bullets (yellow circles) at the falling emoji enemies.
5. Avoid colliding with the enemies and try to shoot them down to increase your score.
6. The game will be over if an enemy reaches the bottom of the game board or if the player collides with an enemy.
7. After the game ends, you can restart the game by tapping on the alert prompt.
Note: This is a basic implementation of a shooting game and can be further enhanced with additional features, levels, and animations. Feel free to modify and improve it according to your requirements.