Sure! Here's a simple game where you have to collect five keys before one minute, while avoiding getting caught by a monster. The game is designed for smartphone operation and uses pictograms.
Key Collector Game
To play the game, simply save the code above in a single HTML file (e.g., "key_collector_game.html") and open it in your web browser. The game will start automatically, and you can use the arrow keys on your keyboard to move the player around and collect keys. Avoid getting caught by the monster!