PR-4.5

Adding the option to toggle the old camera and the custom alien tool are giving me a bit of trouble. As such, to ensure there is still regularish updates I'm going to be releasing what I have currently added as a 'PR-4.5'. As such this will have more bugs than normal and some features may just straight up be broken. I am interested in seeing you play the new difficulties added to Arena mode and see what sort of score you can get. Difficulties not only make the game harder but limit your choice of aliens in the arena.