Added for April 29th

Changed the way enemies spawn in rounds for a more gradual build up and random locations. Spawn is determined by round instead of spawning 2 more enemies every time you kill one.

Changed the arena to one that is more like what I want, as the game will take place on an old rocky world full of old technologies and races.

I always appreciate comments about what I can do to improve my demo and any bugs that are noticed.