UI Improvements
- Improve visibility of the audio level bars, changed the colour / alpha levels as hard to see on some screens.
Feature additons
- Added option to match against an AI for PVP. Players can choose to play against AI opponents if another player cannot be found within a minute. The AI difficulty scales with the players wins on the effected leaderboard. The AI turret aim improves, the available strategies and missile types also expand to increase the difficulty (no extra resource / AI cheating at this time).