Sure! Here's an example of a simple game based on the concept of Flappy Bird, but without any obstacles. The game will use pictograms and can be played on a smartphone. The code is enclosed in script tags and written in JavaScript.
Save this code as an HTML file and open it in a web browser on your smartphone. You'll see a yellow bird (represented by a yellow block) on the canvas. Every time you touch the screen, the bird will move upwards. The game will continue indefinitely as the bird falls back down due to gravity.
Please note that this is a simplified version of the game without any obstacles or proper scoring mechanism. It's meant to demonstrate the basic mechanics of Flappy Bird without complicating it.