Wow, just downloaded bast and looked at it in spectator mode, amazing job. Just thought I'd make a suggestion about the edges of the map. Rather that putting in that odd looking background, why not make the lava go through rock canyons at the edges of the map. That way you can better maintain the illusion that the map isnt inside a box. Me and a friend are going to try and play test it later. I'll let you know how it turns out.
The only justice you can ever have is the justice you make for yourself.