Sure, here's a simple drawing simulator game that you can play on a smartphone:
This HTML file contains a canvas element which acts as the drawing area. The JavaScript code handles the touch events on the canvas and allows you to draw lines by dragging your finger on the screen. The drawn lines are displayed on the canvas using the 2D context.
You can open this file in a browser on your smartphone and start drawing by touching and dragging your finger on the canvas area. The lines will appear on the screen as you draw.