Playtest Iteration 2

It's 2 because I forgot to upload iteration 1 (although the only change there was the minimap, which you also get here).

Other things that have changed:

- Ships now start at least 20% away from the edges of the map, instead of being able to spawn right at the corner and instantly die.

- A sound plays when you score a hit on the other ship

- Controller axis now have deadzones, so that movement feels a little better (I hope).

- There's a pause screen! Start/space to pause. Start/space to unpause. I hope this was not surprising.

The UI still looks pretty bad, but I'll get back to that later.