Made another change on how player homing mines work on deciding what enemy to go after if there is more than one, goes after closest.
Boss on wave 10+ now has guided missiles, on 15+ drops mines.
Player homing mines no longer go after Death Star.
Fighter gets faster on each later wave.
Enemies now fire shots as well. If they hit a rock, it spawns more than usual, but not as many as the UFO.
Ammo bar for secondary weapon is now gray instead of white.
Boss chases player after all turrets are destroyed.
Only the UFO does not hit small rocks.
Player can no longer force spawn into something.