Sure, here is an example of a simple game that meets your requirements:
In this game, the player controls a sheep using the up arrow key to make it jump. The goal is to avoid colliding with the ground blocks. If the sheep collides with a block, the game ends, and an alert is shown with an option to restart the game.
To represent the sheep, you can use an image file named "emozi_himawari.png" and make sure it is in the same directory as the HTML file. Alternatively, you can replace the image source and styling with a pictogram of your choice. The ground blocks are represented as black rectangles on the bottom of the screen.
Feel free to customize and enhance the game as per your requirements.