Sure, here's an example of a simple implementation of the game using HTML and JavaScript:
To play the game, you can save this code into an HTML file, open it in a web browser, and control the blue cube using the arrow keys on your computer's keyboard. The aim is to eat all the black cubes and avoid the red cubes. The game ends when you either eat all the black cubes or collide with a red cube. The score is displayed at the top left corner of the screen.