Chrome 42+ disables NPAPI plugins like Unity3d plugin.
Copy and paste the following text into your browser: chrome://flags/#enable-npapi and enable the NPAPI plugin.
Or try another browser like Firefox
Play with the popular fighters of the Lego series Ninjago. Choose one of your favorite characters and start the action adventure. Jump from side to side while dodging obstacles. Use your arrow keys and CTRL to play the game.