Sure! Here's a simple implementation of the game you described using HTML and JavaScript:
To play the game, open the HTML file in a web browser. Use the arrow keys to move the player and press the space bar to shoot. The goal is to eat all the moving black circles while avoiding colliding with them when you are smaller than them. The more black circles you eat, the bigger the player becomes, and the bigger the bullets. The game ends if the player collides with a black circle when their size reaches the maximum of 100.