Red starts defending, blue attacking. Sides are swapped when the ball touches force field or a goal is scored.
UPDATE:
Beta4:
- increased e-field to > 3x depth of beta3, slanted sides more to compensate
- blue center spawn moved towards other blue spawns
- blue keeper spawn at old center spawn location
http://pickitup.ath.cx/stuff/DB-OneGoal_Beta4.zip

History:
Beta 3:
- Spawns moved: (red = defence, blue = offence)
red starts in front of pbox: no more keeper power mess
blue at sides of pbox
blue center & keeper start at ball spawn
initial ball spawn moved to penalty point: more balanced, red is likely to get ball first, but has to swap sides before they can score.
- BlockingVolume around goal to avoid getting stuck
- decreased energy field depth, to avoid self-passing with sidewalls
- bots now know who's attacking/defending, but aim too low to hit energy field
Beta2:
- Moved goal into wall. Done to increase field size, but field seems huge now

- Red (defending) team's spawns moved into penalty zone.
Allows red team to start with a keeper.
- Using MaterialSwitch to change texture of walls, floor and monitors.
Should work with Dynamic Lighting off now.
- Energy field will loose the rings when switch is not available.
- Added sound announcing attacking team.
- Message displayed also includes the attacking team.
- Removed debug chat spam