alpha 1.2.0

Changes:

Added shields:

• Shields can recharge after a delay
• Some enemies have shields

Added minimap:

• Enemy ships are visible
• Health pickups and asteroids are also visible

Added weapons:

• Default gun - good all rounder
• Gatling gun - high fire rate but innacurate
• Sniper gun - lots of damage but low fire rate
• Laser - constant damage

Improved enemies:

• Improved enemy AI
• Added drones - easy to pick off
• Added missile ship - watchout!
• Motherships now fire missiles at you

Other:

• Added screenshake
• Added seeded map generation
• Fixed a bunch of bugs