Codesteroids is an HTML5 canvas arcade game inspired by the classic Asteroids. The story (from the opening splash screen) Your javascript engine is out of control! Destroy the rogue keywords before they destroy you. You pilot a ship around a circuit board, shooting at rotating keywords. When you hit one, the character is eliminated and the word splits. Each word has its own AI with varying levels of aggression. They will also shoot semicolons at you if you get too close. To shoot a guided shot hit z, a spread shot with x, and use the arrow keys to navigate.
Some cool implementation details:
- Movement code is DRYed up by having all the game actors (the ship, enemies, and bullets) inherit from the same constructor.
- A custom vector object handles positions and headings, and has the logic for rotations, adding/subtracting, and other vector operations.
- Keywords coordinate movements through a doubly linked list, with the left-most element choosing what to do.
- Enemy AI is implemented using finite-state machines.
- All the actors have physical limitations, so they can only accelerate and turn so fast.
The only dependencies are keymaster for getting input and underscore for the array functional helpers.
Go to the live link or download the repo and navigate to the file on your computer.
I want to add TypeError, SyntaxError, etc. enemies that shoot messages like
undefined is not a function at the ship. I also want to add infinite loops that
suck the ship toward them.