Sure! Here's a simple implementation of a Lego Ninjago pixel game where you have to save Ninjago city from the darkness. Please note that this is a basic implementation and can be further customized and improved based on your requirements.
To play the game:
1. Create an HTML file on your computer and copy the above code into it.
2. Save the file with an appropriate name, such as "lego_ninjago_game.html".
3. Open the HTML file in a web browser (preferably on a smartphone for the intended experience).
4. Use the left and right arrow keys to move the green square (Ninjago) and avoid the black square (darkness).
5. The game will continuously update your score as you play.
6. If Ninjago collides with the darkness, the game will end, and an alert will display your final score.
7. To play again, refresh the page.