New and updated:

- Added rank to level chooser screen
- Drones show smoke when they are damaged and hit
- Added option to turn off asteroids
- Crates move more when shot
- Dead drones can be used as clubs to kill other enemies

Fixed:

- Fixed keyboard focus issues on howtoplay and other screens
- Fixed bug where some buttons would still make noise when SFX volume was 0
- Fixed coin spawning into walls
- Fixed continue button advancing to next level when sector not unlocked