This was my first programming achievement. This game was built before I discovered TDD. In fact, I built this before I was aware of basic object oriented principles. The code is horrible, but functional. It becomes laggy if you progress too far; the object spawn rates increase the further you go.
Firing a torpedo passed a distance of about 20,000px converts the game from a shooter to a powerpoint presentation (not really).
Have a look at the code if you're feeling brave.
This game is built with vanilla Javascript, HTML and CSS. I used express to host it on my local machine. I later added a sqlite database and a very basic api to my server to store highscores. All of this is now intergrated into my website.
The design is simple enough. An update() function is called by a SetInterval() which updates the game dependent on various booleans. Who doesn't love global variables? These booleans are controlled by some event listeners (e.g. the arrow keys). For example if (vector.left == true) the sub will move left. The booleans for collisions of images (on transparent backgrounds) include lots of "seemingly magic" numbers. Hey, it works.
This is a game hosted on my website so why not have a play! Also there is a VERY simple bug (that could easily be resolved) which will enable you to cheat a good highscore. Can you work it out?
Visit my website and navigate to the copyright page to find image copyright: http://ricky.hewitt.tech