The targets for the slingshot game are defined in TargetGame::addTargets
public void addTargets()
{
this.addRowOfTargetsOnLane(0, Target.middleLane, 1500, 5, Target.mediumSpeed, spawnFromRight: false);
this.addRowOfTargetsOnLane(4000, Target.nearLane, 1000, 5, Target.mediumSpeed)...