As an AI text-based model, I can provide you with the code for a simple tower defense game using JavaScript. However, since I cannot directly interact with the browser or display pictograms, I will provide you with the code logic and structure.
Here's a sample code for the tower defense game in a single HTML file:
Please note that this implementation only includes the basic functionality of creating enemies and moving them across the game board. It does not include tower placement, different tower types, or their specific behaviors. You can expand on the provided code and enhance it according to your requirements.