Social Media Links Not Showing What I Want, Share links are not displaying the content that I want... Options

[Jabbamonkey]

So, this is a question relating to social media links. I set up a Donkey Kong Fan Site and added some social media links to the top (top right on a desktop, under the menu on mobile).

I have several questions relating to the social media links that I created ...

FACEBOOK
When you click the FACEBOOK icon on my site, a share page opens and shows an image from my parent site www.classicgaming.cc and not an image from www.classicgaming.cc/classics/donkey-kong/
How do I get the shared facebook image to show my donkey kong image...
http://www.classicgaming.cc/classics/donke...ing-735x735.jpg (note: I have my htaccess set to block hot-linking, so the image may not show if you just click the link ... if that happens, just refresh the image, and it should load).

TWITTER
The twitter link works fine, but it doesn't show an image. Is there a way to create a twitter share link that shows a specific image that I want (i.e. the image above)?

GOOGLE+
This link seems to work fine.

PINTEREST
When I click this icon... the pinterest posting shows a broken image. However, when I inspect the code, the link actually points to the correct image? Could this be a result of my htaccess "prevent hot linking" code?

TUMBLR
When this icon is clicked, I get taken to tumblr ... but it shows a broken image. When I inspect the page, the link is going to fav_icon.png (which is the favorite icon of my site). How do I get the page to show a different image (i.e. the image I mention above)???