I played on Monday with a boy rated ~1450 and had White.   He started bravely, with Jaenisch Gambit, here is the game.

I knew that I have to play d3 and Nc3,  then had to improvise.  When he played Bg4 I had a feeling that have a winning line there.  After some calculation I realized, that even with him getting the piece back after g5 I am better, so played Bxf6.

After 16… Rf4 I saw the idea of mating combination with Nxg6, but it was not possible in this position. Rxe4 was a good move and a trap at the same time, inviting to take on c2. He did and after Ng6+ resigned.