Sure! Here's a simple game that meets your requirements. Please note that the game design is intentionally basic for demonstration purposes:
To play the game, you can copy and paste the entire code into a new HTML file and open it using a web browser. The game will start automatically and you can control the Grim Reaper's position using touch or mouse movement. Your goal is to touch/kill all the red people within 60 seconds to win. If you don't kill them all within the given time, you lose. The current score and time left will be displayed on the screen.