Scrap Ships v0.5

Enemies now fly around the screen instead of just clumping in the centre

Added upgrade lost/restored voice lines

Added a zone-cleared voiceline

Heavy guns and shotguns now have a bit of kickback

Changed asteroids to small satalites

Added a fourth difficulty zone with a new large station that fires in all directions but drops a lot of scrap

Added on-death sound for enemies

Fixed cursor being slightly offset

Enemies have a few second delay before opening fire

Fixed OnDestroy effects trying to trigger as the game closes

Tightened up enemy hitboxes, made them a little smaller