Sure, here's an example of a simple game where you explore a dark house using arrow keys to move around and avoid people hiding:
To play the game, simply save the above code into an HTML file, open it using a web browser, and use the arrow keys to move the player around the dark house. The player's vision is represented by a circle, and if the player comes close to any person hiding, a "Game Over" alert will be displayed, and the game can be restarted by pressing OK.