Sure, here's a simple game implemented as a single HTML file using JavaScript. The game is played on a smartphone and uses pictograms. Please note that this is a basic game and might not have all the features or complexity you might expect from a finished game.
To play the game, you can save this code into an HTML file and open it in a smartphone browser. Tap or click on the canvas to move the player object, represented as a red circle, and try to catch the pictogram (represented by a moon emoji) to increase your score. As the game progresses, the night background will gradually darken.