e4 e5 Ke2?! can be answered by Ke7 or the dubious gambit I read somewhere, Ba3?!, or just a normal developing move such as Bc5 or d6.
1.e4 e5 2.Ke2?!

You win with this? Nf6 or d5 are the first things that come to my mind. The purpose of e4 is center control, freeing the Queen and Bishop. You've killed 2 or the 3.

Yes, this is a great opening. Although it violates opening principles, the idea is to advance the king toward the center of the board. White is playing for the endgame! Once White reaches the endgame, he should have the upper hand due to his improved king position. Although White has to defend for a while, liquidating often brings long-term success in this opening.
This is one of my favorite surprise openings I have used. I have had quite a bit of success with it. Does anybody else play this opening?
Maybe we can work out a little theory in this line with a good discussion.
Sure!
Here's the latest theory on this line:
1.e4 e5 2.Ke2 Nf6 White resigns :)
Steinitz-Paulsen 1870 began 1. e4 e5 2. Nc3 Nc6 3. f4 exf 4. d4 Qh4+ 5. Ke2. Steinitz won this famous game and others with his "wandering king." Perhaps this is what has inspired Conquiscador, although the immediate 2. Ke2 is far more unsound than the Steinitz move.

Hasn't anyone heard of the Bongcloud?
This opening is similar, and thus an excellent choice against any player.

Please post a game where somebody lost to this opening...notice that I don't say ""won with this opening".
A bug scurrying across one's living room floor is a surprise too.

Well, I am quite surprised I generated so much interest with such a dubious opening. I have played it before, but 2...Nf6 virtually guarentees black an advantage. I have played it for fun, but it is difficult to get a playable position.
This is one of my favorite surprise openings I have used. I have had quite a bit of success with it. Does anybody else play this opening?
Maybe we can work out a little theory in this line with a good discussion.