     // Bounding boxes
     let playableRect        : CGRect
     let spawnRectBounds     : CGRect
-    var spawnRects          : [CGRect]
+    let spawnZoneBounds     : CGRect
     
     // Player variables
     var player              : Player!

    static let Enemy     : UInt32 = 0b1 // 1
    static let Bullet    : UInt32 = 0b10 // 2
    static let Player    : UInt32 = 0b101 // 4
}

import SpriteKit

            width: playableRect.width + maxEnemySize.width * 2,
            height: playableRect.height + maxEnemySize.height * 2
        )
        spawnZoneBounds = CGRect(
            x: playableRect.minX - maxEnemySize.width/2,
            y: playableRect.minY - maxEnemySize.height/2,
            width: playableRect.width + maxEnemySize.width,
            height: playableRect.height + maxEnemySize.height
        )
        
        super.init(size: size)
    }
