Sure, here's an example of a basic implementation of a top-down scrolling bullet hell shooter game using JavaScript and HTML:
This code creates a simple top-down scrolling bullet hell shooter game. The player can control a spaceship at the bottom of the screen, dodging incoming bullets from enemies that come down from the top. The goal is to blast all the enemies on the screen. The player can shoot bullets by pressing the spacebar.
Please note that this is a basic implementation and can be expanded upon and improved in various ways.