Sure, I can help you create a simple game using JavaScript enclosed in script tags within a single HTML file. Here's an example of a game where you can throw around emoji characters on a smartphone interface. Please note that this is a basic implementation, and you can customize and expand it further to suit your needs:
Emoji Throwing Game
🎯
The code sets up a game area where an emoji character appears. By touching and dragging the emoji on a smartphone, a projectile motion effect is simulated, causing the emoji to move in the direction and distance determined by the user's touch gesture. The game can be customized further with additional features, levels, and scoring mechanisms based on your specific requirements.