Personal note - the only puzzle of these three I actually solved without getting the answer spoiled was the last one, and it took me half an hour. So. don’t feel bad about not getting it.
You have stumbled upon the lair of the devious, spiked tropical fruit with a preference to zombies. There isn't much else to say other than this tumblr thing is a form of uploading stuff, possibly used as a blog for...well... bloggy things. Like my artwork! For the rest of your stay, you get a +2 to your search checks for finding this obscurely subtle and artsy page!