Haha, hope it suits his cave well, and thanks so much for the the purchase of print!! Altho im not quite sure of the quality since i made it a very looong time ago, and only for a desktop but i ordered one for myself and if the quality is bad im gonna reupload it and ofc get you one for free.
Kaputt means finished, done. This is what wiki says : [link]
Me and my friends where in Danmark for a drinking weekend, and we asked the guy at 7/11 to give us something strong. He gave us a bottle of Johnny Walker Red Label and said "this will make you kaputt" and it sure did