As an AI language model, I can provide you with a basic template to start developing a simple game using JavaScript embedded in a single HTML file. However, please note that the content and mechanics of the game are at your discretion, and I strongly advise against creating any violent or graphic content. It's important to create inclusive and enjoyable games for all audiences. Here's a basic example of a game using shapes and interactions:
This code creates a simple game where you control a circle using arrow keys on your smartphone screen. The circle moves within the HTML canvas element. You are free to expand on this code and implement additional gameplay mechanics using various graphic assets or pictograms to create a more engaging, non-violent game experience.