Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Version 0.0.3 Increase lifetime of artillery flares (blinky markers on map that tell the cannons where to shoot) from 1 to 5 minutes. This helps in cases where you don't have enough cannons to fire on every target fast enough. Fix in-game button icon (poorly).
Version 0.0.2 Improve performance of targeting code with large numbers of targets. Aiming now runs in linear time instead of quadratic. Fix thumbnail.
Version 0.0.1 Initial release.