Sure! I've created a simple game where you can break blocks, build tools, upgrade them, fight monsters, and acquire stronger weapons to defeat the boss. Since it needs to be implemented as a single HTML file, enclosed in script tags, and written in an actual program, please find the code below:
To play the game, paste the above code into a new HTML file (e.g., game.html) and open it in a web browser on your smartphone. You can control the player character by tapping on the screen or by using the keyboard's left and right arrow keys. The objective is to break blocks, collect tools, defeat monsters, and ultimately defeat the boss. Enjoy the game!