I played a short and funky game as Black on Lichess not too long ago, in which I fell victim to a gambit trap that caught me totally off guard. Due to the mental blow that I received, I didn't play too well afterward and I soon resigned.
Here is the game that I played.
[FEN ""] 1. Nf3 d5 2. e4 dxe4 3. Ng5 Nf6 4. d3 exd3 5. Bxd3 h6 6. Nxf7 Kxf7 7. Bg6+ Kxg6 8. Qxd8 Nc6 9. Qxc7 Nd5 10. Qg3+ Kh7 11. O-O e5 12. Qd3+
Unfortunately, I do not have time to research this on my own, as I am posting this just before I need to go to bed. I have tried to formulate this question as best as I can in the short time that I have had to speed type it. All I know is that the gambit is called the Tennison Gambit, as that's what Stockfish calls it.
I have four basic questions here:
Is there a specific name for this opening trap?
After the gambit is done, how should I play on?
How can I refute the gambit?
How should I play after the gambit is accepted?
I would also highly appreciated any sources that cover this topic.