Pacing

Lots of work on AI and balance.

I've changed enemy block ship spawning to be based on a map-pin method. Whenever the player moves far enough from the pin, it is moved to their current position and an enemy ship is spawned. The spawn area is limited to right in front of the player's flight path (originally you could fly past armies that got spawned off-screen). Every 4 spawns an elite ship is dropped - making your first macguffin block involve a fight with a big ship. Weapons progression is a bit fast, but that will slow down once I've added more blocks - I haven't even added a polymorph gun yet.

Enemy AI was struggling with some of the new blocks and features. They should be better equipped to handle their surroundings from now on.

Some sounds have been added, global volume is halved, and bugs have been fixed but still some remain.

As well as crazy new blocks I've still another beast to add to the space highways. I think it's going to have to be a leviathan of sorts.