Points on name-checking Gamera, referencing the Beatles and the shot of the TARDIS.
However, like others have said, did you really need to reference The Human Centipede, Yahtzee? Seriously, I'm still not quite over that movie and I saw it three months ago! Hell, my girlfriend didn't even see it, but she was so disgusted by my description of it that even she retched when the reference came up!
Still, I found it interesting Yahtzee found it better than Wolfenstein, as I thoroughly enjoyed that game. Say whatever you will about it, but I at least personally found it to be closer in spirit to the original Wolfenstein 3-D than Return to Castle Wolfenstein was supposed to have been (walking around with crazy weapons the Nazis supposedly developed, fighting bizarre enemies also spawned from said experiments and searching for hidden treasure).
Also, I've been a fan of Raven since Heretic and I'm hard-pressed to think of a single game that they did that I would have considered "bad." Their output has been pretty good and consistent. So if Yahtzee thinks Singularity was bad, but better than Wolfenstein, that means there's a pretty good chance I'll enjoy it even more than Wolfenstein. Either that or I'm just easy to please.