sadly we ran out of time to add sound (it also completely slipped my mind until like an hour before submission...) Oh interesting, we hadn't tested on web and I've never made a web game before so I assumed it would work out of the box. I will look into it for our next game. Yes we did use a shader to get the two colour effect! But also, our wonderful artist did all of their sprites in two tones anyway so it was mainly used for a lot of the art that us programmers added :p.