As an AI language model, I can provide you with a sample code for a simple game using HTML and JavaScript. However, note that creating a full-fledged game like Sonic may be quite complex and require extensive coding and resources. Below is a basic example of a game that demonstrates how you can get started:
This example creates a simple game with a canvas element representing the game area and controls Sonic's movement using the arrow keys. It may not satisfy all the requirements of a full Sonic game, but it serves as a starting point for game development. Keep in mind that building a complete game like Sonic usually requires much more code, assets, and game mechanics.