Tri-Phase Defense

Intro

The ring-station is under attack by a relentless swarm of "space urchins." As the station's automated defense AI, it’s your duty to fend off these spiky aliens. However, a technical malfunction has compromised your multitasking capabilities, forcing you to cycle between different roles at regular intervals. How long can you protect the station?

Gameplay

The game is split into 3 phases:

• The build phase
  • Spend resources on buildings such as turrets to lure & defeat enemies
    
  • Place upgrades to improve your stats (make sure to keep these defended - if an enemy destroys the upgrade building you loose the upgrade)
  • Scan for asteroids by right-clicking. You'll be told how close your cursor was to an asteroid. If you hit an asteroid it's location will be revealed.

• The gather phase
  • Control the mining ship and mine asteroids to produce resources
  • Deliver the resources to the station
  • Right-click to see how far away the nearest asteroid is from the ship. If you move close enough the asteroid will be revealed.

• The combat phase
  • Destroy the enemies! Left-click to fire

Tips

• Every time you fully mine an asteroid a new one will spawn - but it won't be visible until you scan it.
• The enemies are dumb and will target the nearest building - so building decoys can be useful to divert their attention from more valuable targets
• It's easier to scan for asteroids in the build phase since you can use the mouse cursor.
• Playing in fullscreen is recommended.

Acknowledgements

• Crates used:
  • avian - collision detection
  • bevy_health_bar3d - health bars
• Sound effects created using jsfxr
• Music made using the M8 tracker

Source code available here

Note that the MacOS build is untested. Let me know if you run into issues.