dev: Clean up. Don't put things in Window scope
dev: Tidy up game.js
dev: Separate game loader and playing state
New title screen
Fix menu for Touch and unmute sound on iOS
Make any game key close the title screen
Touch buttons have icons
A touch button to access the menu.
dev: refactoring
Fix camera jumping on game start
Fix one-frame glitch at start of game (the player starts in a falling state and previously took one frame to change to a grounded animation.
touch buttons have black backgrounds and look smaller
Hide the other player in single player mode
Improve network game connection feedback
Add a fake loading bar for some reason?
hide browser chrome on iOS Safari
Go fullscreen on small screens (on touch devices only).