Sure! Here's a simple flight game implemented as a single HTML file with JavaScript. The game allows you to control a plane in a free-roaming environment using basic smartphone operations. I'll use pictograms to enhance the visual experience.
To play the game on a smartphone, open the HTML file using a web browser. The game uses the smartphone's device orientation to control the plane. Tilt the phone to move the plane around the screen. The objective is to navigate the plane freely without hitting the clouds or the mountain.
Note: This is a simple example just to demonstrate the concept. More features and functionalities can be added to make it a fully-fledged game according to your requirements.