It's a pop-up card for Valentine's Day. For your valentine who would get an old Zelda reference, that is. If you don't think that's gonna fly, then you probably want a more traditional card.
For those of you scratching your heads, it's a combination of the guy in the cave who says this message and the heart container that gives you precious extra life.
The idea for this card comes from kate12345's Pixelated popup card