Sure! Here's an example of a simple Boat War game implemented as a single HTML file, using JavaScript and pictograms. You can play it on a smartphone by tapping on the screen to shoot missiles at the boats.
Boat War
In this game, a boat is displayed at the bottom of the play area, and whenever the screen is tapped, a missile is launched from the top of the screen towards the boat. The goal is to hit the boat with the missiles. If a missile hits the boat, the game ends.