Sure! Here's a simple example of a 2D game that can be played on a smartphone using pictograms. The player can upgrade their weapons as they progress in the game.
In this game, you control a player icon represented by a filled rectangle. By touching and moving on the canvas, you can move the player around. The objective is to reach the "Upgrade" area located at the bottom right corner of the canvas. Whenever the player reaches the upgrade area, their weapon is upgraded, and the upgrade counter is incremented.
Please note that this is just a very basic example and can be expanded upon to include more complex gameplay, levels, enemies, and other features based on your requirements.