Sure! Here's an example of a game that meets your requirements. Copy and paste the code into a single HTML file, and open it in a web browser to play the game.
Shoe Game
Shoe Value: 0
This game consists of a pair of shoes displayed with a shoe value above them. There are two buttons, "Left" and "Right", on either side of the screen. Pressing the "Left" button decreases the shoe value, while pressing the "Right" button increases it. The initial shoe value is set to 0.
You can continue pressing the buttons and see the shoe value increase or decrease accordingly.