Post-Jam Update

Long overdue update to fix issues that appeared during the jam, and introduce some other general improvements. Content of the game is still the same.

Additions:

• Added controller support.
• Added a pause menu when pressing Escape on keyboard, or Start/Menu button on controller.
• Added audio queues when switching unit types.

Improvements:

• Increased the collision radius of miners so they don't overlap as much.
• When the enemy begins an attack, they will keep attacking until the amount of bomb drones they have falls below some lower threshold. Previously the decision to attack and stop attacking used the same threshold so as soon as the first bomb drone detonated the whole army would fall back, only to start attacking again as soon as a new drone was produced.
• Improved the factory UI by adding a health bar and making the build progress match the rest of the UI.
• Improved art for resource nodes and cliffs.
• Repositioned the camera in level 3 to better center the level geometry on screen.

Bug Fixes:

• Fixed a crash/freeze when the player's factory is destroyed.
• Fixed a bug where two resource nodes were overlapping on level 2.