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(मूल) Simple Rules of Christmas Tree Light Up

You can follow a few simple rules:

• The solution will not have open ends or loops.
• Starting from the edges, for example:
  
  
  
  
  
  
• A cross must have all adjacent blocks pointing to it:
  
  
  
  
  
  
• Remember the blocks which you are certain about their orientations, for example:
  
  The highlighted block can have a number of different orientations:
  
  
  But if you know that the orientation of the bulb is correct, the highlighted block can only be oriented as follows:
  
  
  

(मूल) That's exactly how I reached 21.76s in this game.