Streamlined the game's initialisation process.
Not sure why that was PHP instead of HTML. Changed it.
Refactored things. Broke it. Fixed it. Streamlined the order in which things load. Divided functionality into more sensible chunks of code. Broke it again. Fixed it again. Committing now before I break it again. Ready for a title screen, proper game over screen, credits and local high score tables. Then it's difficulty tweaking and then I'm ready to call this a v1.0
Added manifest.webapp for testing on Firefox OS