Updates & pc download

I added an online leaderboard to the game but found that it didn't connect properly in WEBGL D: I suspect there's probably way to make it work but I haven't the willpower to find it, instead I made a downloadable PC version which should connect to that aspect of the game properly, if you are interested in that. FYI the scoreboards for desktop / mobile versions of the game are separate, so you won't see your desktop high score on the mobile leaderboard and vice versa.

There have been a bunch of updates I haven't been keeping track of here, check the googly doc for a full list of changes 

https://bit.ly/2QdB0oW <- googly doc link

I'll have a mac version up soon as well, I just need one of my friends with a mac to test it and make sure it actually runs first.