Online Multiplayer Update!

Huge update !

Added online multiplayer (currently replaces the local multiplayer, but later both options will be allowed)

Fixed car collisions, added exit and replay functionality and much more.

There are some known bugs and new features in the backlog, but it's in an alpha state and great for first multiplayer demo !

Hope you like it, let me know about any bugs you find / ideas you have! Thanks for following and playing!