Add particles
Merge remote-tracking branch 'origin/Working' into Working
Merge remote-tracking branch 'origin/Working'
Some code cleanup and interface changes.
Clean up comments and add an obstacle.
Keep track of negative status.
Resize the physics bodies.
Merge remote-tracking branch 'origin/Working' into nick
Obstacle works and fix for leaning on obstacle and getting it to disappear.
Negative color change
Merge remote-tracking branch 'origin/Working' into nick