Sure! Here's a sample game implemented as a single HTML file, using JavaScript and pictograms for an alien game featuring humans and guns. You can play it on your smartphone:
This game features a spaceship controlled by the player, and an alien enemy. The spaceship can be moved left and right using the arrow keys, and bullets can be shot by pressing the spacebar. The objective is to hit the alien with the bullets. The game loop continuously updates and renders the game elements on the canvas.