Added an EMP Missile Tower as the 4th level Missile Tower upgrade. Does less damage than a normal missile tower but does a very high bonus damage to shields.
Added a difficulty select. Normal is normal and currently Hard increases all enemies health by 50%. In a multiplayer game the easiest of all selected difficulties will be used (untested)
Fixed issues with crystal laser beam and sound effects! (rebuilt the weapon from the ground up as the void ray beam was a big mess)
Changed enemy speeds to be more consistent.
Dragon Towers no longer ignore armor but do more bonus damage to Light and Biological units.
Increased rewards on the lower levels to give you more chance to build a variety of towers.
General balance changes. let me know if I have made it too hard or too easy again.
