Use the Canary Key to enter to the canary mine that is located at the Rock Ridge. You will have a mini cart game inside the mine, all you need to do is wait for the signal flags to appear and then click on them to shoot them. When you do the track will correct itself so that you avoid some nasty obstacles in your way. After several of the signals, you’ll arrive at the end of the mine track. At the end of the mine, you will find the Blue Tulip.
How to get the Canary Key
On the train, go to Rock Ridge. Go straight to the right to the mine. Before going into the mine, walk to the left and click on the canary. You’ll shoot your gun and frighten him, making him drop the Canary Key.