Content and Balance Update - Alpha 0.15 — Mad Metal Steam update #522818

Content: New vehicle added: Police Interceptor. Balance: Average vehicle weight increased from 1,600lbs. to 4,000lbs to reduce "floatiness". Traction increased by 33% across all surfaces. Shotgun damage reduced by 50% (10x5 to 5x5). Missile damage reduced by 33% (50 to 33). Enemies retreat when health falls below 25%. Enemy pursuit speed reduced by 33% - 50%.