Two comments
Good fun, nice artwork -- I've got two comments. Firstly, did you create it -- it's great artwork, very professional. Secondly, if the message has any importance at all why not translate it to English (I'm not saying all the internet should be in English, but hey, the Portal is)?
I notice it was a commercial of some sorts, but my German's not good enough -- something about easter surprises, and what, earth-rights, and passing the card along to a friend?