Sure! Here's a simple robot fighting game implemented as a single HTML file using JavaScript, enclosed in script tags:
Robot Fighting Game
In this game, you control a player robot using the up and down arrow keys on your smartphone device to move the robot up and down respectively. Pressing the spacebar initiates an attack. The enemy robot is stationary for now, but you can implement the attack logic to make the robots interact.
Please note that this is a very basic implementation just to get you started. You can customize and enhance the game mechanics, visuals, and logic as per your requirements.