Auto generate a screenshot whenever the "Minceraft" [sic] screen appears

Two reasons for this:

One, the player does not have to worry about doing it themselves, in case they accidentally click through the screen or accidentally close the window without realizing they got the easter egg.

Two, if a player does miss it happening, it will still show up in their screenshots whenever they go back and look, perhaps months or years later, and the easter egg will still be there to give them a nice surprise.

If a player still wants to generate their own screenshot for some reason, like they want a specific part of the panorama in the shot, they can still do that.