Sure! Here's a simplified version of Flappy Bird implemented as a single HTML file containing JavaScript. The game can be played on a smartphone and uses pictograms for better visual representation. To play the game, simply open the HTML file in any web browser on your smartphone.
This implementation includes a simple game loop, gravity effect on the bird, scoring system, collision detection, touch/click event handling, and game over functionality. The bird is represented by a red square pictogram, and the obstacles are represented by green rectangles. The score is displayed on the top-left corner of the canvas.