Sure, here's a simple robot game implemented as a single HTML file using JavaScript:
In this game, the player controls a robot on a game board using the arrow keys. The goal is to reach the green goal cell on the board. The game board is represented by a grid of cells, and the robot is represented by a red cell. The goal cell is randomly positioned at the start of the game.
The player can move the robot up, down, left, or right within the boundaries of the game board. When the robot reaches the goal cell, a congratulatory message is displayed, and the game is reset with a new random goal position.
Please note that this is a simplified example, and you can extend and customize the game as per your requirements.