Sure! Here's a simple calculator game implemented in a single HTML file using JavaScript and enclosed in script tags:
Calculator Game
This calculator game allows you to input numbers (0-9) and basic arithmetic operations (+, -, *, /) using the provided buttons. The display at the top shows the numbers and operations you input, and pressing the "=" button will calculate the result. You can also clear the display by pressing the "C" button. The game is suitable for smartphone operation and uses pictogram-like buttons for the input.