Time is running out for the NZ High School Game Jam. 
You should be finished all your game mechanics now and working on aesthetics and polish. Audio and particle systems are a great ( quick!) way to give user feedback and improve the feel of your game. And a Main menu with a way to quit your game would be nice too!!

Don't forget to test-test-test as a BUILT WebGL/HTML5 game to make sure it's playable.

Good luck everyone!