Great hint Faidir. Also, you should use your Stopwatch whenever you feel stuck. It gives you hints like this.
("Can you give me the key?" - Ninth time: N33ERX13)
Mage made a figherfighting game! [D2JJE8D]
No need to understand Japanese, all you need to do is to aim water at the base of fire to extinguish via touch screen. If the orange bar reaches across the screen, game over! 4 stages in total.
Enjoy! (I'm not affiliated with this game)
Use your stopwatch whenever you feel stuck. The Lord would have told you the same thing like this.
The key was re-posted the 8th time just yesterday. Learn to search for old post on Miiverse. It's so easy, even a caveman could do it. Just 28 posts down.