Update: Added upgradable walls. T1 to T3. T2 walls require two T1 walls to build. T3 requires two T2 walls and two copper-plates to build. T1 health=350, T2 health=700, T3 health=1500.
Upgradable gun turrets. Spend money on upgrades.
made for comfy mountain fortress scenario.
Only one tier 10 turret allowed on map.

Feel free to ask me for changes or customization if you need small tweaks for this to suit your server.

Future hopes:
Healing building that heals walls/defensive buildings. This feature prevents robots from constantly dying repairing/replacing walls/mines.
Upgradable lasers and flamers.