Sure! Here's a sample HTML file that implements a racer game for Ben 10, similar to Mario Kart. Note that this is a simplified version and can be further enhanced with additional features and graphics.
Ben 10 Racer
To play the game, you can simply copy and paste the above code into a new HTML file, save it, and then open it in a web browser. Use the left and right arrow keys to move the player (represented by a red square) and dodge the obstacles (represented by green squares). The game will continue until a collision occurs. After game over, a popup will display your final score and the game will automatically restart.